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/**************************************************************************
**
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** Copyright (c) 2014 AudioCodes Ltd.
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** Author: Orgad Shaneh <orgad.shaneh@audiocodes.com>
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
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**
** GNU Lesser General Public License Usage
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** 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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****************************************************************************/
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#include "clearcaseplugin.h"
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#include "activityselector.h"
#include "checkoutdialog.h"
#include "clearcaseconstants.h"
#include "clearcasecontrol.h"
#include "clearcaseeditor.h"
#include "clearcasesubmiteditor.h"
#include "clearcasesubmiteditorwidget.h"
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#include "clearcasesync.h"
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#include "settingspage.h"
#include "versionselector.h"
#include "ui_undocheckout.h"

#include <coreplugin/actionmanager/actioncontainer.h>
#include <coreplugin/actionmanager/actionmanager.h>
#include <coreplugin/actionmanager/command.h>
#include <coreplugin/coreconstants.h>
#include <coreplugin/documentmanager.h>
#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/icore.h>
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#include <coreplugin/infobar.h>
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#include <coreplugin/messagemanager.h>
#include <coreplugin/mimedatabase.h>
#include <coreplugin/progressmanager/progressmanager.h>
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#include <coreplugin/locator/commandlocator.h>
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#include <projectexplorer/projectexplorer.h>
#include <projectexplorer/project.h>
#include <projectexplorer/iprojectmanager.h>
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#include <utils/algorithm.h>
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#include <utils/synchronousprocess.h>
#include <utils/parameteraction.h>
#include <utils/fileutils.h>
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#include <utils/hostosinfo.h>
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#include <utils/qtcassert.h>
#include <utils/runextensions.h>
#include <vcsbase/basevcseditorfactory.h>
#include <vcsbase/basevcssubmiteditorfactory.h>
#include <vcsbase/vcsbaseeditor.h>
#include <vcsbase/vcsbaseeditorparameterwidget.h>
#include <vcsbase/vcsbaseoutputwindow.h>
#include <vcsbase/vcsbasesubmiteditor.h>


#include <QAction>
#include <QDebug>
#include <QDialog>
#include <QDialogButtonBox>
#include <QDir>
#include <QFileInfo>
#include <QFuture>
#include <QFutureInterface>
#include <QInputDialog>
#include <QList>
#include <QMainWindow>
#include <QMenu>
#include <QMessageBox>
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#include <QMetaObject>
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#include <QMutex>
#include <QProcess>
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#include <QRegExp>
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#include <QSharedPointer>
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#include <QtConcurrentRun>
#include <QTemporaryFile>
#include <QTextCodec>
#include <QtPlugin>
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#include <QUrl>
#include <QUuid>
#include <QVariant>
#include <QVBoxLayout>
#include <QXmlStreamReader>
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#ifdef WITH_TESTS
#include <QTest>
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#include <coreplugin/vcsmanager.h>
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#endif
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using namespace Core;
using namespace ProjectExplorer;

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namespace ClearCase {
namespace Internal {

static const char CMD_ID_CLEARCASE_MENU[]     = "ClearCase.Menu";
static const char CMD_ID_CHECKOUT[]           = "ClearCase.CheckOut";
static const char CMD_ID_CHECKIN[]            = "ClearCase.CheckInCurrent";
static const char CMD_ID_UNDOCHECKOUT[]       = "ClearCase.UndoCheckOut";
static const char CMD_ID_UNDOHIJACK[]         = "ClearCase.UndoHijack";
static const char CMD_ID_DIFF_CURRENT[]       = "ClearCase.DiffCurrent";
static const char CMD_ID_HISTORY_CURRENT[]    = "ClearCase.HistoryCurrent";
static const char CMD_ID_ANNOTATE[]           = "ClearCase.Annotate";
static const char CMD_ID_ADD_FILE[]           = "ClearCase.AddFile";
static const char CMD_ID_DIFF_ACTIVITY[]      = "ClearCase.DiffActivity";
static const char CMD_ID_CHECKIN_ACTIVITY[]   = "ClearCase.CheckInActivity";
static const char CMD_ID_UPDATEINDEX[]        = "ClearCase.UpdateIndex";
static const char CMD_ID_UPDATE_VIEW[]        = "ClearCase.UpdateView";
static const char CMD_ID_CHECKIN_ALL[]        = "ClearCase.CheckInAll";
static const char CMD_ID_STATUS[]             = "ClearCase.Status";

static const VcsBase::VcsBaseEditorParameters editorParameters[] = {
{
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    VcsBase::LogOutput,
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    "ClearCase File Log Editor",   // id
    QT_TRANSLATE_NOOP("VCS", "ClearCase File Log Editor"),   // display_name
    "ClearCase File Log Editor",   // context
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    "text/vnd.qtcreator.clearcase.log"},
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{    VcsBase::AnnotateOutput,
    "ClearCase Annotation Editor",  // id
    QT_TRANSLATE_NOOP("VCS", "ClearCase Annotation Editor"),   // display_name
    "ClearCase Annotation Editor",  // context
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    "text/vnd.qtcreator.clearcase.annotation"},
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{   VcsBase::DiffOutput,
    "ClearCase Diff Editor",  // id
    QT_TRANSLATE_NOOP("VCS", "ClearCase Diff Editor"),   // display_name
    "ClearCase Diff Editor",  // context
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    "text/x-patch"}
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};

// Utility to find a parameter set by type
static inline const VcsBase::VcsBaseEditorParameters *findType(int ie)
{
    const VcsBase::EditorContentType et = static_cast<VcsBase::EditorContentType>(ie);
    return VcsBase::VcsBaseEditorWidget::findType(editorParameters, sizeof(editorParameters)/sizeof(VcsBase::VcsBaseEditorParameters), et);
}

static inline QString debugCodec(const QTextCodec *c)
{
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    return c ? QString::fromLatin1(c->name()) : QString::fromLatin1("Null codec");
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}

// ------------- ClearCasePlugin
ClearCasePlugin *ClearCasePlugin::m_clearcasePluginInstance = 0;

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ViewData::ViewData() :
    isDynamic(false),
    isUcm(false)
{
}

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ClearCasePlugin::ClearCasePlugin() :
    m_commandLocator(0),
    m_checkOutAction(0),
    m_checkInCurrentAction(0),
    m_undoCheckOutAction(0),
    m_undoHijackAction(0),
    m_diffCurrentAction(0),
    m_historyCurrentAction(0),
    m_annotateCurrentAction(0),
    m_addFileAction(0),
    m_diffActivityAction(0),
    m_updateIndexAction(0),
    m_updateViewAction(0),
    m_checkInActivityAction(0),
    m_checkInAllAction(0),
    m_statusAction(0),
    m_checkInSelectedAction(0),
    m_checkInDiffAction(0),
    m_submitUndoAction(0),
    m_submitRedoAction(0),
    m_menuAction(0),
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    m_submitActionTriggered(false),
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    m_activityMutex(new QMutex),
    m_statusMap(new StatusMap)
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  #ifdef WITH_TESTS
   ,m_fakeClearTool(false)
  #endif
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{
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    qRegisterMetaType<ClearCase::Internal::FileStatus::Status>("ClearCase::Internal::FileStatus::Status");
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}

ClearCasePlugin::~ClearCasePlugin()
{
    cleanCheckInMessageFile();
    // wait for sync thread to finish reading activities
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    m_activityMutex->lock();
    m_activityMutex->unlock();
    delete m_activityMutex;
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}

void ClearCasePlugin::cleanCheckInMessageFile()
{
    if (!m_checkInMessageFileName.isEmpty()) {
        QFile::remove(m_checkInMessageFileName);
        m_checkInMessageFileName.clear();
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        m_checkInView.clear();
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    }
}

bool ClearCasePlugin::isCheckInEditorOpen() const
{
    return !m_checkInMessageFileName.isEmpty();
}

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/// Files in this directories are under ClearCase control
QStringList ClearCasePlugin::getVobList() const
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{
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    QStringList args(QLatin1String("lsvob"));
    args << QLatin1String("-s");
    const ClearCaseResponse response =
            runCleartool(currentState().topLevel(), args, m_settings.timeOutMS(), SilentRun);

    return response.stdOut.split(QLatin1Char('\n'), QString::SkipEmptyParts);
}

/// Get the drive letter of a path
/// Necessary since QDir(directory).rootPath() returns C:/ in all cases
QString ClearCasePlugin::getDriveLetterOfPath(const QString &directory)
{
    // cdUp until we get just the drive letter
    QDir dir(directory);
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    while (!dir.isRoot() && dir.cdUp())
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    { }

    return dir.path();
}

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void ClearCasePlugin::updateStatusForFile(const QString &absFile)
{
    setStatus(absFile, getFileStatus(absFile), false);
}

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/// Give warning if a derived object is edited
void ClearCasePlugin::updateEditDerivedObjectWarning(const QString &fileName,
                                                     const FileStatus::Status status)
{
    if (!isDynamic())
        return;

    Core::IDocument *curDocument = Core::EditorManager::currentDocument();
    if (!curDocument)
        return;

    Core::InfoBar *infoBar = curDocument->infoBar();
    const Core::Id derivedObjectWarning("ClearCase.DerivedObjectWarning");

    if (status == FileStatus::Derived) {
        if (!infoBar->canInfoBeAdded(derivedObjectWarning))
            return;

        infoBar->addInfo(Core::InfoBarEntry(derivedObjectWarning,
                                            tr("Editing Derived Object: %1")
                                            .arg(fileName)));
    } else {
        infoBar->removeInfo(derivedObjectWarning);
    }
}

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FileStatus::Status ClearCasePlugin::getFileStatus(const QString &fileName) const
{
    QTC_CHECK(!fileName.isEmpty());

    const QDir viewRootDir = QFileInfo(fileName).dir();
    const QString viewRoot = viewRootDir.path();

    QStringList args(QLatin1String("ls"));
    args << fileName;
    QString buffer = runCleartoolSync(viewRoot, args);

    const int atatpos = buffer.indexOf(QLatin1String("@@"));
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    if (atatpos != -1) { // probably a managed file
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        const QString absFile =
                viewRootDir.absoluteFilePath(
                    QDir::fromNativeSeparators(buffer.left(atatpos)));
        QTC_CHECK(QFile(absFile).exists());
        QTC_CHECK(!absFile.isEmpty());

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        // "cleartool ls" of a derived object looks like this:
        // /path/to/file/export/MyFile.h@@--11-13T19:52.266580
        const QChar c = buffer.at(atatpos + 2);
        const bool isDerivedObject = c != QLatin1Char('/') && c != QLatin1Char('\\');
        if (isDerivedObject)
            return FileStatus::Derived;

        // find first whitespace. anything before that is not interesting
        const int wspos = buffer.indexOf(QRegExp(QLatin1String("\\s")));
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        if (buffer.lastIndexOf(QLatin1String("CHECKEDOUT"), wspos) != -1)
            return FileStatus::CheckedOut;
        else
            return FileStatus::CheckedIn;
    } else {
        QTC_CHECK(QFile(fileName).exists());
        QTC_CHECK(!fileName.isEmpty());
        return FileStatus::NotManaged;
    }
}

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///
/// Check if the directory is managed by ClearCase.
///
/// There are 6 cases to consider for accessing ClearCase views:
///
/// 1) Windows: dynamic view under M:\<view_tag> (working dir view)
/// 2) Windows: dynamic view under Z:\ (similar to unix "set view" by using "subst" or "net use")
/// 3) Windows: snapshot view
/// 4) Unix: dynamic view under /view/<view_tag> (working dir view)
/// 5) Unix: dynamic view which are set view (transparent access in a shell process)
/// 6) Unix: snapshot view
///
/// Note: the drive letters M: and Z: can be chosen by the user. /view is the "view-root"
///       directory and is not configurable, while VOB names and mount points are configurable
///       by the ClearCase admin.
///
/// Note: All cases except #5 have a root directory, i.e., all files reside under a directory.
///       For #5 files are "mounted" and access is transparent (e.g., under /vobs).
///
/// For a view named "myview" and a VOB named "vobA" topLevels would be:
/// 1) M:/myview/vobA
/// 2) Z:/vobA
/// 3) c:/snapshots/myview/vobA
/// 4) /view/myview/vobs/vobA
/// 5) /vobs/vobA/
/// 6) /home/<username>/snapshots/myview/vobs/vobA
///
/// Note: The VOB directory is used as toplevel although the directory one up could have been
///       used on cases execpt 5. For case 5 it would have been /, which we don't want.
///
/// "cleartool pwv" returns the values for "set view" and "working directory view", also for
/// snapshot views.
///
/// \returns The ClearCase topLevel/VOB directory for this directory
QString ClearCasePlugin::ccManagesDirectory(const QString &directory) const
{
    QStringList args(QLatin1String("pwv"));
    const ClearCaseResponse response =
            runCleartool(directory, args, m_settings.timeOutMS(), SilentRun);

    if (response.error)
        return QString();

    const QStringList result = response.stdOut.split(QLatin1Char('\n'), QString::SkipEmptyParts);
    if (result.size() != 2)
        return QString();

    const QByteArray workingDirPattern("Working directory view: ");
    if (!result[0].startsWith(QLatin1String(workingDirPattern)))
        return QString();
    const QString workingDirectoryView = result[0].mid(workingDirPattern.size());

    const QByteArray setViewDirPattern("Set view: ");
    if (!result[1].startsWith(QLatin1String(setViewDirPattern)))
        return QString();
    const QString setView = result[1].mid(setViewDirPattern.size());

    const QString none(QLatin1String("** NONE **"));
    QString rootDir;
    if (setView != none || workingDirectoryView != none)
        rootDir = ccViewRoot(directory);
    else
        return QString();

    // Check if the directory is inside one of the known VOBs.
    static QStringList vobs;
    if (vobs.empty())
        vobs = getVobList();
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    foreach (const QString &relativeVobDir, vobs) {
        const QString vobPath = QDir::cleanPath(rootDir + QDir::fromNativeSeparators(relativeVobDir));
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        const bool isManaged = (vobPath == directory)
                || Utils::FileName::fromString(directory).isChildOf(Utils::FileName::fromString(vobPath));
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        if (isManaged)
            return vobPath;
    }
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    return QString();
}

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/// Find the root path of a clearcase view. Precondition: This is a clearcase managed dir
QString ClearCasePlugin::ccViewRoot(const QString &directory) const
{
    QStringList args(QLatin1String("pwv"));
    args << QLatin1String("-root");
    const ClearCaseResponse response =
            runCleartool(directory, args, m_settings.timeOutMS(), SilentRun);

    QString root = response.stdOut.trimmed();

    if (root.isEmpty()) {
        if (Utils::HostOsInfo::isWindowsHost())
            root = getDriveLetterOfPath(directory);
        else
            root = QLatin1String("/");
    }

    return QDir::fromNativeSeparators(root);
}

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/*! Find top level for view that contains \a directory
 *
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 * Handles both dynamic views and snapshot views.
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 */
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QString ClearCasePlugin::findTopLevel(const QString &directory) const
{
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    // Do not check again if we've already tested that the dir is managed,
    // or if it is a child of a managed dir (top level).
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    if ((directory == m_topLevel) ||
            Utils::FileName::fromString(directory).isChildOf(Utils::FileName::fromString(m_topLevel)))
        return m_topLevel;

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    return ccManagesDirectory(directory);
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}

static const VcsBase::VcsBaseSubmitEditorParameters submitParameters = {
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    Constants::CLEARCASE_SUBMIT_MIMETYPE,
    Constants::CLEARCASECHECKINEDITOR_ID,
    Constants::CLEARCASECHECKINEDITOR_DISPLAY_NAME,
    Constants::CLEARCASECHECKINEDITOR,
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    VcsBase::VcsBaseSubmitEditorParameters::DiffFiles
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};

bool ClearCasePlugin::initialize(const QStringList & /*arguments */, QString *errorMessage)
{
    typedef VcsBase::VcsSubmitEditorFactory<ClearCaseSubmitEditor> ClearCaseSubmitEditorFactory;
    using namespace Constants;

    using namespace Core::Constants;
    using namespace ExtensionSystem;

    initializeVcs(new ClearCaseControl(this));

    m_clearcasePluginInstance = this;
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    connect(ICore::instance(), SIGNAL(coreAboutToClose()), this, SLOT(closing()));
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    connect(ProgressManager::instance(), SIGNAL(allTasksFinished(Core::Id)),
            this, SLOT(tasksFinished(Core::Id)));
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    if (!MimeDatabase::addMimeTypes(QLatin1String(":/clearcase/ClearCase.mimetypes.xml"), errorMessage))
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        return false;

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    m_settings.fromSettings(ICore::settings());
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    // update view name when changing active project
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    connect(ProjectExplorerPlugin::instance(), SIGNAL(currentProjectChanged(ProjectExplorer::Project*)),
            this, SLOT(projectChanged(ProjectExplorer::Project*)));
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    addAutoReleasedObject(new SettingsPage);

    addAutoReleasedObject(new ClearCaseSubmitEditorFactory(&submitParameters));

    // any editor responds to describe (when clicking a version)
    static const char *describeSlot = SLOT(describe(QString,QString));
    const int editorCount = sizeof(editorParameters)/sizeof(VcsBase::VcsBaseEditorParameters);
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    const auto widgetCreator = []() { return new ClearCaseEditorWidget; };
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    for (int i = 0; i < editorCount; i++)
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        addAutoReleasedObject(new VcsBase::VcsEditorFactory(editorParameters + i, widgetCreator, this, describeSlot));
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    const QString description = QLatin1String("ClearCase");
    const QString prefix = QLatin1String("cc");
    // register cc prefix in Locator
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    m_commandLocator = new Core::CommandLocator("cc", description, prefix);
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    addAutoReleasedObject(m_commandLocator);

    //register actions
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    ActionContainer *toolsContainer = ActionManager::actionContainer(M_TOOLS);
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    ActionContainer *clearcaseMenu = ActionManager::createMenu(CMD_ID_CLEARCASE_MENU);
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    clearcaseMenu->menu()->setTitle(tr("C&learCase"));
    toolsContainer->addMenu(clearcaseMenu);
    m_menuAction = clearcaseMenu->menu()->menuAction();
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    Context globalcontext(C_GLOBAL);
    Command *command;
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    m_checkOutAction = new Utils::ParameterAction(tr("Check Out..."), tr("Check &Out \"%1\"..."), Utils::ParameterAction::AlwaysEnabled, this);
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    command = ActionManager::registerAction(m_checkOutAction, CMD_ID_CHECKOUT,
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        globalcontext);
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    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+O") : tr("Alt+L,Alt+O")));
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    connect(m_checkOutAction, SIGNAL(triggered()), this, SLOT(checkOutCurrentFile()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_checkInCurrentAction = new Utils::ParameterAction(tr("Check &In..."), tr("Check &In \"%1\"..."), Utils::ParameterAction::AlwaysEnabled, this);
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    command = ActionManager::registerAction(m_checkInCurrentAction, CMD_ID_CHECKIN, globalcontext);
    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+I") : tr("Alt+L,Alt+I")));
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    connect(m_checkInCurrentAction, SIGNAL(triggered()), this, SLOT(startCheckInCurrentFile()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_undoCheckOutAction = new Utils::ParameterAction(tr("Undo Check Out"), tr("&Undo Check Out \"%1\""), Utils::ParameterAction::AlwaysEnabled, this);
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    command = ActionManager::registerAction(m_undoCheckOutAction, CMD_ID_UNDOCHECKOUT, globalcontext);
    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+U") : tr("Alt+L,Alt+U")));
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    connect(m_undoCheckOutAction, SIGNAL(triggered()), this, SLOT(undoCheckOutCurrent()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_undoHijackAction = new Utils::ParameterAction(tr("Undo Hijack"), tr("Undo Hi&jack \"%1\""), Utils::ParameterAction::AlwaysEnabled, this);
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    command = ActionManager::registerAction(m_undoHijackAction, CMD_ID_UNDOHIJACK, globalcontext);
    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+R") : tr("Alt+L,Alt+R")));
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    connect(m_undoHijackAction, SIGNAL(triggered()), this, SLOT(undoHijackCurrent()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    clearcaseMenu->addSeparator(globalcontext);

    m_diffCurrentAction = new Utils::ParameterAction(tr("Diff Current File"), tr("&Diff \"%1\""), Utils::ParameterAction::EnabledWithParameter, this);
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    command = ActionManager::registerAction(m_diffCurrentAction,
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        CMD_ID_DIFF_CURRENT, globalcontext);
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    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+D") : tr("Alt+L,Alt+D")));
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    connect(m_diffCurrentAction, SIGNAL(triggered()), this, SLOT(diffCurrentFile()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_historyCurrentAction = new Utils::ParameterAction(tr("History Current File"), tr("&History \"%1\""), Utils::ParameterAction::EnabledWithParameter, this);
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    command = ActionManager::registerAction(m_historyCurrentAction,
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        CMD_ID_HISTORY_CURRENT, globalcontext);
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    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+H") : tr("Alt+L,Alt+H")));
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    connect(m_historyCurrentAction, SIGNAL(triggered()), this,
        SLOT(historyCurrentFile()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_annotateCurrentAction = new Utils::ParameterAction(tr("Annotate Current File"), tr("&Annotate \"%1\""), Utils::ParameterAction::EnabledWithParameter, this);
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    command = ActionManager::registerAction(m_annotateCurrentAction,
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        CMD_ID_ANNOTATE, globalcontext);
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    command->setAttribute(Command::CA_UpdateText);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+A") : tr("Alt+L,Alt+A")));
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    connect(m_annotateCurrentAction, SIGNAL(triggered()), this,
        SLOT(annotateCurrentFile()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_addFileAction = new Utils::ParameterAction(tr("Add File..."), tr("Add File \"%1\""), Utils::ParameterAction::EnabledWithParameter, this);
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    command = ActionManager::registerAction(m_addFileAction, CMD_ID_ADD_FILE, globalcontext);
    command->setAttribute(Command::CA_UpdateText);
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    connect(m_addFileAction, SIGNAL(triggered()), this, SLOT(addCurrentFile()));
    clearcaseMenu->addAction(command);

    clearcaseMenu->addSeparator(globalcontext);

    m_diffActivityAction = new QAction(tr("Diff A&ctivity..."), this);
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    m_diffActivityAction->setEnabled(false);
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    command = ActionManager::registerAction(m_diffActivityAction, CMD_ID_DIFF_ACTIVITY, globalcontext);
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    connect(m_diffActivityAction, SIGNAL(triggered()), this, SLOT(diffActivity()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_checkInActivityAction = new Utils::ParameterAction(tr("Ch&eck In Activity"), tr("Chec&k In Activity \"%1\"..."), Utils::ParameterAction::EnabledWithParameter, this);
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    m_checkInActivityAction->setEnabled(false);
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    command = ActionManager::registerAction(m_checkInActivityAction, CMD_ID_CHECKIN_ACTIVITY, globalcontext);
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    connect(m_checkInActivityAction, SIGNAL(triggered()), this, SLOT(startCheckInActivity()));
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    command->setAttribute(Command::CA_UpdateText);
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    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    clearcaseMenu->addSeparator(globalcontext);

    m_updateIndexAction = new QAction(tr("Update Index"), this);
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    command = ActionManager::registerAction(m_updateIndexAction, CMD_ID_UPDATEINDEX, globalcontext);
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    connect(m_updateIndexAction, SIGNAL(triggered()), this, SLOT(updateIndex()));
    clearcaseMenu->addAction(command);

    m_updateViewAction = new Utils::ParameterAction(tr("Update View"), tr("U&pdate View \"%1\""), Utils::ParameterAction::EnabledWithParameter, this);
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    command = ActionManager::registerAction(m_updateViewAction, CMD_ID_UPDATE_VIEW, globalcontext);
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    connect(m_updateViewAction, SIGNAL(triggered()), this, SLOT(updateView()));
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    command->setAttribute(Command::CA_UpdateText);
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    clearcaseMenu->addAction(command);

    clearcaseMenu->addSeparator(globalcontext);

    m_checkInAllAction = new QAction(tr("Check In All &Files..."), this);
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    command = ActionManager::registerAction(m_checkInAllAction, CMD_ID_CHECKIN_ALL, globalcontext);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+F") : tr("Alt+L,Alt+F")));
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    connect(m_checkInAllAction, SIGNAL(triggered()), this, SLOT(startCheckInAll()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    m_statusAction = new QAction(tr("View &Status"), this);
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    command = ActionManager::registerAction(m_statusAction, CMD_ID_STATUS, globalcontext);
    command->setDefaultKeySequence(QKeySequence(UseMacShortcuts ? tr("Meta+L,Meta+S") : tr("Alt+L,Alt+S")));
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    connect(m_statusAction, SIGNAL(triggered()), this, SLOT(viewStatus()));
    clearcaseMenu->addAction(command);
    m_commandLocator->appendCommand(command);

    // Actions of the submit editor
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    Context clearcasecheckincontext(Constants::CLEARCASECHECKINEDITOR);
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    m_checkInSelectedAction = new QAction(VcsBase::VcsBaseSubmitEditor::submitIcon(), tr("Check In"), this);
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    command = ActionManager::registerAction(m_checkInSelectedAction, Constants::CHECKIN_SELECTED, clearcasecheckincontext);
    command->setAttribute(Command::CA_UpdateText);
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    connect(m_checkInSelectedAction, SIGNAL(triggered()), this, SLOT(checkInSelected()));

    m_checkInDiffAction = new QAction(VcsBase::VcsBaseSubmitEditor::diffIcon(), tr("Diff Selected Files"), this);
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    command = ActionManager::registerAction(m_checkInDiffAction , Constants::DIFF_SELECTED, clearcasecheckincontext);
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    m_submitUndoAction = new QAction(tr("&Undo"), this);
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    command = ActionManager::registerAction(m_submitUndoAction, Core::Constants::UNDO, clearcasecheckincontext);
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    m_submitRedoAction = new QAction(tr("&Redo"), this);
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    command = ActionManager::registerAction(m_submitRedoAction, Core::Constants::REDO, clearcasecheckincontext);
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    return true;
}

// called before closing the submit editor
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bool ClearCasePlugin::submitEditorAboutToClose()
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{
    if (!isCheckInEditorOpen())
        return true;

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    ClearCaseSubmitEditor *editor = qobject_cast<ClearCaseSubmitEditor *>(submitEditor());
    QTC_ASSERT(editor, return true);
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    IDocument *editorDocument = editor->document();
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    QTC_ASSERT(editorDocument, return true);
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    // Submit editor closing. Make it write out the check in message
    // and retrieve files
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    const QFileInfo editorFile(editorDocument->filePath());
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    const QFileInfo changeFile(m_checkInMessageFileName);
    if (editorFile.absoluteFilePath() != changeFile.absoluteFilePath())
        return true; // Oops?!

    // Prompt user. Force a prompt unless submit was actually invoked (that
    // is, the editor was closed or shutdown).
    bool prompt = m_settings.promptToCheckIn;
    const VcsBase::VcsBaseSubmitEditor::PromptSubmitResult answer =
            editor->promptSubmit(tr("Closing ClearCase Editor"),
                                 tr("Do you want to check in the files?"),
                                 tr("The comment check failed. Do you want to check in the files?"),
                                 &prompt, !m_submitActionTriggered);
    m_submitActionTriggered = false;
    switch (answer) {
    case VcsBase::VcsBaseSubmitEditor::SubmitCanceled:
        return false; // Keep editing and change file
    case VcsBase::VcsBaseSubmitEditor::SubmitDiscarded:
        cleanCheckInMessageFile();
        return true; // Cancel all
    default:
        break;
    }
    // If user changed
    if (prompt != m_settings.promptToCheckIn) {
        m_settings.promptToCheckIn = prompt;
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        m_settings.toSettings(ICore::settings());
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    }

    const QStringList fileList = editor->checkedFiles();
    bool closeEditor = true;
    if (!fileList.empty()) {
        // get message & check in
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        closeEditor = DocumentManager::saveDocument(editorDocument);
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        if (closeEditor) {
            ClearCaseSubmitEditorWidget *widget = editor->submitEditorWidget();
            closeEditor = vcsCheckIn(m_checkInMessageFileName, fileList, widget->activity(),
                                   widget->isIdentical(), widget->isPreserve(),
                                   widget->activityChanged());
        }
    }
    // vcsCheckIn might fail if some of the files failed to check-in (though it does check-in
    // those who didn't fail). Therefore, if more than one file was sent, consider it as success
    // anyway (sync will be called from vcsCheckIn for next attempt)
    closeEditor |= (fileList.count() > 1);
    if (closeEditor)
        cleanCheckInMessageFile();
    return closeEditor;
}

void ClearCasePlugin::diffCheckInFiles(const QStringList &files)
{
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    ccDiffWithPred(m_checkInView, files);
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}

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static inline void setWorkingDirectory(IEditor *editor, const QString &wd)
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{
    if (VcsBase::VcsBaseEditorWidget *ve = qobject_cast<VcsBase::VcsBaseEditorWidget*>(editor->widget()))
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        ve->setWorkingDirectory(wd);
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}

//! retrieve full location of predecessor of \a version
QString ClearCasePlugin::ccGetPredecessor(const QString &version) const
{
    QStringList args(QLatin1String("describe"));
    args << QLatin1String("-fmt") << QLatin1String("%En@@%PSn") << version;
    const ClearCaseResponse response =
            runCleartool(currentState().topLevel(), args, m_settings.timeOutMS(), SilentRun);
    if (response.error || response.stdOut.endsWith(QLatin1Char('@'))) // <name-unknown>@@
        return QString();
    else
        return response.stdOut;
}

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//! Get a list of paths to active VOBs.
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//! Paths are relative to viewRoot
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QStringList ClearCasePlugin::ccGetActiveVobs() const
{
    QStringList res;
    QStringList args(QLatin1String("lsvob"));
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    const QString theViewRoot = viewRoot();

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    const ClearCaseResponse response =
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            runCleartool(theViewRoot, args, m_settings.timeOutMS(), SilentRun);
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    if (response.error)
        return res;
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    // format of output unix:
    // * /path/to/vob   /path/to/vob/storage.vbs <and some text omitted here>
    // format of output windows:
    // * \vob     \\share\path\to\vob\storage.vbs <and some text omitted here>
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    QString prefix = theViewRoot;
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    if (!prefix.endsWith(QLatin1Char('/')))
        prefix += QLatin1Char('/');

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    const QDir theViewRootDir(theViewRoot);
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    foreach (const QString &line, response.stdOut.split(QLatin1Char('\n'), QString::SkipEmptyParts)) {
        const bool isActive = line.at(0) == QLatin1Char('*');
        if (!isActive)
            continue;

        const QString dir =
                QDir::fromNativeSeparators(line.mid(3, line.indexOf(QLatin1Char(' '), 3) - 3));
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        const QString relativeDir = theViewRootDir.relativeFilePath(dir);
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        // Snapshot views does not necessarily have all active VOBs loaded, so we'll have to
        // check if the dirs exists as well. Else the command will work, but the output will
        // complain about the element not being loaded.
        if (QFile::exists(prefix + relativeDir))
            res.append(relativeDir);
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    }
    return res;
}

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void ClearCasePlugin::checkAndReIndexUnknownFile(const QString &file)
{
    if (isDynamic()) {
        // reindex unknown files
        if (m_statusMap->value(file, FileStatus(FileStatus::Unknown)).status == FileStatus::Unknown)
            updateStatusForFile(file);
    }
}

// file must be absolute, and using '/' path separator
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FileStatus ClearCasePlugin::vcsStatus(const QString &file) const
{
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    return m_statusMap->value(file, FileStatus(FileStatus::Unknown));
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}

QString ClearCasePlugin::ccGetFileActivity(const QString &workingDir, const QString &file)
{
    QStringList args(QLatin1String("lscheckout"));
    args << QLatin1String("-fmt") << QLatin1String("%[activity]p");
    args << file;
    const ClearCaseResponse response =
            runCleartool(workingDir, args, m_settings.timeOutMS(), SilentRun);
    return response.stdOut;
}

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ClearCaseSubmitEditor *ClearCasePlugin::openClearCaseSubmitEditor(const QString &fileName, bool isUcm)
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{
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    IEditor *editor =
            EditorManager::openEditor(fileName, Constants::CLEARCASECHECKINEDITOR_ID);
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    ClearCaseSubmitEditor *submitEditor = qobject_cast<ClearCaseSubmitEditor*>(editor);
    QTC_CHECK(submitEditor);
    submitEditor->registerActions(m_submitUndoAction, m_submitRedoAction, m_checkInSelectedAction, m_checkInDiffAction);
    connect(submitEditor, SIGNAL(diffSelectedFiles(QStringList)), this, SLOT(diffCheckInFiles(QStringList)));
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    submitEditor->setCheckScriptWorkingDirectory(m_checkInView);
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    submitEditor->setIsUcm(isUcm);
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    return submitEditor;
}

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QString fileStatusToText(FileStatus fileStatus)
{
    switch (fileStatus.status)
    {
    case FileStatus::CheckedIn:
        return QLatin1String("CheckedIn");
    case FileStatus::CheckedOut:
        return QLatin1String("CheckedOut");
    case FileStatus::Hijacked:
        return QLatin1String("Hijacked");
    case FileStatus::Missing:
        return QLatin1String("Missing");
    case FileStatus::NotManaged:
        return QLatin1String("ViewPrivate");
    case FileStatus::Unknown:
        return QLatin1String("Unknown");
    default:
        return QLatin1String("default");
    }
}

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void ClearCasePlugin::updateStatusActions()
{
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    FileStatus fileStatus = FileStatus::Unknown;
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    bool hasFile = currentState().hasFile();
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    if (hasFile) {
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        QString absoluteFileName = currentState().currentFile();
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        checkAndReIndexUnknownFile(absoluteFileName);
        fileStatus = vcsStatus(absoluteFileName);
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        updateEditDerivedObjectWarning(absoluteFileName, fileStatus.status);

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        if (Constants::debug)
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            qDebug() << Q_FUNC_INFO << absoluteFileName << ", status = "
                     << fileStatusToText(fileStatus.status) << "(" << fileStatus.status << ")";
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    }
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    m_checkOutAction->setEnabled(hasFile && (fileStatus.status & (FileStatus::CheckedIn | FileStatus::Hijacked)));
    m_undoCheckOutAction->setEnabled(hasFile && (fileStatus.status & FileStatus::CheckedOut));
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    m_undoHijackAction->setEnabled(!m_viewData.isDynamic && hasFile && (fileStatus.status & FileStatus::Hijacked));
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    m_checkInCurrentAction->setEnabled(hasFile && (fileStatus.status & FileStatus::CheckedOut));
    m_addFileAction->setEnabled(hasFile && (fileStatus.status & FileStatus::NotManaged));
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    m_diffCurrentAction->setEnabled(hasFile && (fileStatus.status != FileStatus::NotManaged));
    m_historyCurrentAction->setEnabled(hasFile && (fileStatus.status != FileStatus::NotManaged));
    m_annotateCurrentAction->setEnabled(hasFile && (fileStatus.status != FileStatus::NotManaged));
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    m_checkInActivityAction->setEnabled(m_viewData.isUcm);
    m_diffActivityAction->setEnabled(m_viewData.isUcm);
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}

void ClearCasePlugin::updateActions(VcsBase::VcsBasePlugin::ActionState as)
{
    if (!enableMenuAction(as, m_menuAction)) {
        m_commandLocator->setEnabled(false);
        return;
    }
    const VcsBase::VcsBasePluginState state = currentState();
    const bool hasTopLevel = state.hasTopLevel();
    m_commandLocator->setEnabled(hasTopLevel);
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    if (hasTopLevel) {
        const QString topLevel = state.topLevel();
        if (m_topLevel != topLevel) {
            m_topLevel = topLevel;
            m_viewData = ccGetView(topLevel);
        }
    }
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    m_updateViewAction->setParameter(m_viewData.isDynamic ? QString() : m_viewData.name);
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    const QString fileName = state.currentFileName();
    m_checkOutAction->setParameter(fileName);
    m_undoCheckOutAction->setParameter(fileName);
    m_undoHijackAction->setParameter(fileName);
    m_diffCurrentAction->setParameter(fileName);
    m_checkInCurrentAction->setParameter(fileName);
    m_historyCurrentAction->setParameter(fileName);
    m_annotateCurrentAction->setParameter(fileName);
    m_addFileAction->setParameter(fileName);
    m_updateIndexAction->setEnabled(!m_settings.disableIndexer);
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    updateStatusActions();
}

void ClearCasePlugin::checkOutCurrentFile()
{
    const VcsBase::VcsBasePluginState state = currentState();
    QTC_ASSERT(state.hasFile(), return);
    vcsOpen(state.currentFileTopLevel(), state.relativeCurrentFile());
}

void ClearCasePlugin::addCurrentFile()
{
    const VcsBase::VcsBasePluginState state = currentState();
    QTC_ASSERT(state.hasFile(), return);
    vcsAdd(state.currentFileTopLevel(), state.relativeCurrentFile());
}

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// Set the FileStatus of file given in absolute path
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void ClearCasePlugin::setStatus(const QString &file, FileStatus::Status status, bool update)
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{
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    QTC_CHECK(!file.isEmpty());
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    m_statusMap->insert(file, FileStatus(status, QFileInfo(file).permissions()));

    if (update && currentState().currentFile() == file)
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        QMetaObject::invokeMethod(this, "updateStatusActions");
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}

void ClearCasePlugin::undoCheckOutCurrent()
{
    const VcsBase::VcsBasePluginState state = currentState();
    QTC_ASSERT(state.hasFile(), return);
    QString file = state.relativeCurrentFile();
    const QString fileName = QDir::toNativeSeparators(file);

    QStringList args(QLatin1String("diff"));
    args << QLatin1String("-diff_format") << QLatin1String("-predecessor");
    args << fileName;

    const ClearCaseResponse diffResponse =
            runCleartool(state.currentFileTopLevel(), args, m_settings.timeOutMS(), 0);

    bool different = diffResponse.error; // return value is 1 if there is any difference
    bool keep = false;
    if (different) {
        Ui::UndoCheckOut uncoUi;
        QDialog uncoDlg;
        uncoUi.setupUi(&uncoDlg);
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        uncoUi.lblMessage->setText(tr("Do you want to undo the check out of \"%1\"?").arg(fileName));
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        if (uncoDlg.exec() != QDialog::Accepted)
            return;
        keep = uncoUi.chkKeep->isChecked();
    }
    vcsUndoCheckOut(state.topLevel(), file, keep);
}

bool ClearCasePlugin::vcsUndoCheckOut(const QString &workingDir, const QString &fileName, bool keep)
{
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    if (Constants::debug)
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        qDebug() << Q_FUNC_INFO << workingDir << fileName << keep;

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    FileChangeBlocker fcb(fileName);
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    // revert
    QStringList args(QLatin1String("uncheckout"));
    args << QLatin1String(keep ? "-keep" : "-rm");
    args << QDir::toNativeSeparators(fileName);

    const ClearCaseResponse response =
            runCleartool(workingDir, args, m_settings.timeOutMS(),
                         ShowStdOutInLogWindow | FullySynchronously);

    if (!response.error) {
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        const QString absPath = workingDir + QLatin1Char('/') + fileName;

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        if (!m_settings.disableIndexer)
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            setStatus(absPath, FileStatus::CheckedIn);
        clearCaseControl()->emitFilesChanged(QStringList(absPath));
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    }
    return !response.error;
}

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/*! Undo a hijacked file in a snapshot view
 *
 * Runs cleartool update -overwrite \a fileName in \a workingDir
 * if \a keep is true, renames hijacked files to <filename>.keep. Otherwise it is overwritten
 */
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bool ClearCasePlugin::vcsUndoHijack(const QString &workingDir, const QString &fileName, bool keep)
{
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    if (Constants::debug)
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        qDebug() << Q_FUNC_INFO << workingDir << fileName << keep;
    QStringList args(QLatin1String("update"));
    args << QLatin1String(keep ? "-rename" : "-overwrite");
    args << QLatin1String("-log");
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    if (Utils::HostOsInfo::isWindowsHost())
        args << QLatin1String("NUL");
    else
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    args << QLatin1String("/dev/null");
    args << QDir::toNativeSeparators(fileName);

    const ClearCaseResponse response =
            runCleartool(workingDir, args, m_settings.timeOutMS(),
                   ShowStdOutInLogWindow | FullySynchronously);
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    if (!response.error && !m_settings.disableIndexer) {
        const QString absPath = workingDir + QLatin1Char('/') + fileName;
        setStatus(absPath, FileStatus::CheckedIn);
    }
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    return !response.error;
}

void ClearCasePlugin::undoHijackCurrent()
{
    const VcsBase::VcsBasePluginState state = currentState();
    QTC_ASSERT(state.hasFile(), return);
    const QString fileName = state.relativeCurrentFile();

    bool keep = false;
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    bool askKeep = true;
    if (m_settings.extDiffAvailable) {
        QString diffres = diffExternal(ccGetFileVersion(state.topLevel(), fileName), fileName);
        if (diffres.at(0) == QLatin1Char('F')) // Files are identical
            askKeep = false;
    }
    if (askKeep) {
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        Ui::UndoCheckOut unhijackUi;
        QDialog unhijackDlg;
        unhijackUi.setupUi(&unhijackDlg);
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        unhijackDlg.setWindowTitle(tr("Undo Hijack File"));
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        unhijackUi.lblMessage->setText(tr("Do you want to undo hijack of \"%1\"?")
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                                       .arg(QDir::toNativeSeparators(fileName)));
        if (unhijackDlg.exec() != QDialog::Accepted)
            return;
        keep = unhijackUi.chkKeep->isChecked();
    }

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    FileChangeBlocker fcb(state.currentFile());
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    // revert
    if (vcsUndoHijack(state.currentFileTopLevel(), fileName, keep))
        clearCaseControl()->emitFilesChanged(QStringList(state.currentFile()));
}

QString ClearCasePlugin::ccGetFileVersion(const QString &workingDir, const QString &file) const
{
    QStringList args(QLatin1String("ls"));
    args << QLatin1String("-short") << file;
    return runCleartoolSync(workingDir, args).trimmed();
}

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void ClearCasePlugin::ccDiffWithPred(const QString &workingDir, const QStringList &files)
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{
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    if (Constants::debug)
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        qDebug() << Q_FUNC_INFO << files;
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    const QString source = VcsBase::VcsBaseEditorWidget::getSource(workingDir, files);
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    QTextCodec *codec = source.isEmpty() ? static_cast<QTextCodec *>(0) : VcsBase::VcsBaseEditorWidget::getCodec(source);

    if ((m_settings.diffType == GraphicalDiff) && (files.count() == 1)) {
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        const QString file = files.first();
        const QString absFilePath = workingDir + QLatin1Char('/') + file;
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        if (vcsStatus(absFilePath).status == FileStatus::Hijacked)
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            diffGraphical(ccGetFileVersion(workingDir, file), file);
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        else
            diffGraphical(file);
        return; // done here, diff is opened in a new window
    }
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    if (!m_settings.extDiffAvailable) {
        VcsBase::VcsBaseOutputWindow::instance()->appendError(
                    tr("External diff is required to compare multiple files."));
        return;
    }
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    QString result;
    foreach (const QString &file, files) {
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        const QString absFilePath = workingDir + QLatin1Char('/') + file;
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        if (vcsStatus(QDir::fromNativeSeparators(absFilePath)).status == FileStatus::Hijacked)
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            result += diffExternal(ccGetFileVersion(workingDir, file), file);
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        else
            result += diffExternal(file);
    }

    QString diffname;

    // diff of a single file? re-use an existing view if possible to support
    // the common usage pattern of continuously changing and diffing a file
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    const QString tag = VcsBase::VcsBaseEditorWidget::editorTag(VcsBase::DiffOutput, workingDir, files);
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    if (files.count() == 1) {
        // Show in the same editor if diff has been executed before
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        if (IEditor *existingEditor = VcsBase::VcsBaseEditorWidget::locateEditorByTag(tag)) {
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            existingEditor->document()->setContents(result.toUtf8());
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            EditorManager::activateEditor(existingEditor);
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            setWorkingDirectory(existingEditor, workingDir);
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            return;
        }
        diffname = QDir::toNativeSeparators(files.first());
    }
    const QString title = QString::fromLatin1("cc diff %1").arg(diffname);
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    IEditor *editor = showOutputInEditor(title, result, VcsBase::DiffOutput, source, codec);
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    setWorkingDirectory(editor, workingDir);
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    VcsBase::VcsBaseEditorWidget::tagEditor(editor, tag);
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    ClearCaseEditorWidget *diffEditorWidget = qobject_cast<ClearCaseEditorWidget *>(editor->widget());
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    QTC_ASSERT(diffEditorWidget, return);
    if (files.count() == 1)
        editor->setProperty("originalFileName", diffname);
}

QStringList ClearCasePlugin::ccGetActivityVersions(const QString &workingDir, const QString &activity)
{
    QStringList args(QLatin1String("lsactivity"));
    args << QLatin1String("-fmt") << QLatin1String("%[versions]Cp") << activity;
    const ClearCaseResponse response =
        runCleartool(workingDir, args, m_settings.timeOutMS(), SilentRun);
    if (response.error)
        return QStringList();
    QStringList versions = response.stdOut.split(QLatin1String(", "));
    versions.sort();
    return versions;
}

void ClearCasePlugin::rmdir(const QString &path)
{
    QDir dir(path);
    foreach (QFileInfo fi, dir.entryInfoList(QDir::AllEntries | QDir::NoDotAndDotDot)) {
        if (fi.isDir()) {
            rmdir(fi.canonicalFilePath());
            dir.rmdir(fi.baseName());
        }
        else
            QFile::remove(fi.canonicalFilePath());
    }
}

void ClearCasePlugin::diffActivity()
{
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    typedef QMap<QString, QStringPair>::Iterator FileVerIt;

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    const VcsBase::VcsBasePluginState state = currentState();
    QTC_ASSERT(state.hasTopLevel(), return);
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    if (Constants::debug)
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        qDebug() << Q_FUNC_INFO;
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    if (!m_settings.extDiffAvailable) {
        VcsBase::VcsBaseOutputWindow::instance()->appendError(
                    tr("External diff is required to compare multiple files."));
        return;
    }
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    QString topLevel = state.topLevel();
    QString activity = QInputDialog::getText(0, tr("Enter Activity"), tr("Activity Name"), QLineEdit::Normal, m_activity);
    if (activity.isEmpty())
        return;
    QStringList versions = ccGetActivityVersions(topLevel, activity);

    QString result;
    // map from fileName to (first, latest) pair
    QMap<QString, QStringPair> filever;
    int topLevelLen = topLevel.length();
    foreach (const QString &version, versions) {
        QString shortver = version.mid(topLevelLen + 1);
        int atatpos = shortver.indexOf(QLatin1String("@@"));
        if (atatpos != -1) {
            QString file = shortver.left(atatpos);
            // latest version - updated each line
            filever[file].second = shortver;

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            // pre-first version. only for the first occurrence
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