Added 3rdpart QtSingleApplication class. Fixed some overall-status

issues.

src/3rdparty/qtlockedfile/README.txt

@@ -0,0 +1,5 @@
+This is the src directory of the  QtLockedFile
+solution integrated over from Qt's Qt Creator. 
+
+It is required by the QtSingleApplication solution.
+

src/3rdparty/qtlockedfile/qtlockedfile.cpp

@@ -0,0 +1,159 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtlockedfile.h"
+
+namespace SharedTools {
+
+/*!
+    \class QtLockedFile
+
+    \brief The QtLockedFile class extends QFile with advisory locking functions.
+
+    A file may be locked in read or write mode. Multiple instances of
+    \e QtLockedFile, created in multiple processes running on the same
+    machine, may have a file locked in read mode. Exactly one instance
+    may have it locked in write mode. A read and a write lock cannot
+    exist simultaneously on the same file.
+
+    The file locks are advisory. This means that nothing prevents
+    another process from manipulating a locked file using QFile or
+    file system functions offered by the OS. Serialization is only
+    guaranteed if all processes that access the file use
+    QtLockedFile. Also, while holding a lock on a file, a process
+    must not open the same file again (through any API), or locks
+    can be unexpectedly lost.
+
+    The lock provided by an instance of \e QtLockedFile is released
+    whenever the program terminates. This is true even when the
+    program crashes and no destructors are called.
+*/
+
+/*! \enum QtLockedFile::LockMode
+
+    This enum describes the available lock modes.
+
+    \value ReadLock A read lock.
+    \value WriteLock A write lock.
+    \value NoLock Neither a read lock nor a write lock.
+*/
+
+/*!
+    Constructs an unlocked \e QtLockedFile object. This constructor behaves in the same way
+    as \e QFile::QFile().
+
+    \sa QFile::QFile()
+*/
+QtLockedFile::QtLockedFile()
+    : QFile()
+{
+#ifdef Q_OS_WIN
+    m_semaphore_hnd = 0;
+    m_mutex_hnd = 0;
+#endif
+    m_lock_mode = NoLock;
+}
+
+/*!
+    Constructs an unlocked QtLockedFile object with file \a name. This constructor behaves in
+    the same way as \e QFile::QFile(const QString&).
+
+    \sa QFile::QFile()
+*/
+QtLockedFile::QtLockedFile(const QString &name)
+    : QFile(name)
+{
+#ifdef Q_OS_WIN
+    m_semaphore_hnd = 0;
+    m_mutex_hnd = 0;
+#endif
+    m_lock_mode = NoLock;
+}
+
+/*!
+    Returns \e true if this object has a in read or write lock;
+    otherwise returns \e false.
+
+    \sa lockMode()
+*/
+bool QtLockedFile::isLocked() const
+{
+    return m_lock_mode != NoLock;
+}
+
+/*!
+    Returns the type of lock currently held by this object, or \e QtLockedFile::NoLock.
+
+    \sa isLocked()
+*/
+QtLockedFile::LockMode QtLockedFile::lockMode() const
+{
+    return m_lock_mode;
+}
+
+/*!
+    \fn bool QtLockedFile::lock(LockMode mode, bool block = true)
+
+    Obtains a lock of type \a mode.
+
+    If \a block is true, this
+    function will block until the lock is acquired. If \a block is
+    false, this function returns \e false immediately if the lock cannot
+    be acquired.
+
+    If this object already has a lock of type \a mode, this function returns \e true immediately. If this object has a lock of a different type than \a mode, the lock
+    is first released and then a new lock is obtained.
+
+    This function returns \e true if, after it executes, the file is locked by this object,
+    and \e false otherwise.
+
+    \sa unlock(), isLocked(), lockMode()
+*/
+
+/*!
+    \fn bool QtLockedFile::unlock()
+
+    Releases a lock.
+
+    If the object has no lock, this function returns immediately.
+
+    This function returns \e true if, after it executes, the file is not locked by
+    this object, and \e false otherwise.
+
+    \sa lock(), isLocked(), lockMode()
+*/
+
+/*!
+    \fn QtLockedFile::~QtLockedFile()
+
+    Destroys the \e QtLockedFile object. If any locks were held, they are released.
+*/
+
+} // namespace SharedTools

src/3rdparty/qtlockedfile/qtlockedfile.h

@@ -0,0 +1,78 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#ifndef QTLOCKEDFILE_H
+#define QTLOCKEDFILE_H
+
+#include <QFile>
+
+#if defined(Q_OS_WIN)
+#  if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
+#    define QT_QTLOCKEDFILE_EXPORT
+#  elif defined(QT_QTLOCKEDFILE_IMPORT)
+#    if defined(QT_QTLOCKEDFILE_EXPORT)
+#      undef QT_QTLOCKEDFILE_EXPORT
+#    endif
+#    define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
+#  elif defined(QT_QTLOCKEDFILE_EXPORT)
+#    undef QT_QTLOCKEDFILE_EXPORT
+#    define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
+#  endif
+#else
+#  define QT_QTLOCKEDFILE_EXPORT
+#endif
+
+namespace SharedTools {
+
+class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
+{
+public:
+    enum LockMode { NoLock = 0, ReadLock, WriteLock };
+
+    QtLockedFile();
+    QtLockedFile(const QString &name);
+    ~QtLockedFile();
+
+    bool lock(LockMode mode, bool block = true);
+    bool unlock();
+    bool isLocked() const;
+    LockMode lockMode() const;
+
+private:
+#ifdef Q_OS_WIN
+    Qt::HANDLE m_semaphore_hnd;
+    Qt::HANDLE m_mutex_hnd;
+#endif
+    LockMode m_lock_mode;
+};
+
+} // namespace SharedTools
+
+#endif // QTLOCKEDFILE_H

src/3rdparty/qtlockedfile/qtlockedfile_unix.cpp

@@ -0,0 +1,108 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtlockedfile.h"
+
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+namespace SharedTools {
+
+bool QtLockedFile::lock(LockMode mode, bool block)
+{
+    if (!isOpen()) {
+        qWarning("QtLockedFile::lock(): file is not opened");
+        return false;
+    }
+
+    if (mode == NoLock)
+        return unlock();
+
+    if (mode == m_lock_mode)
+        return true;
+
+    if (m_lock_mode != NoLock)
+        unlock();
+
+    struct flock fl;
+    fl.l_whence = SEEK_SET;
+    fl.l_start = 0;
+    fl.l_len = 0;
+    fl.l_type = (mode == ReadLock) ? F_RDLCK : F_WRLCK;
+    int cmd = block ? F_SETLKW : F_SETLK;
+    int ret = fcntl(handle(), cmd, &fl);
+
+    if (ret == -1) {
+        if (errno != EINTR && errno != EAGAIN)
+            qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
+        return false;
+    }
+
+
+    m_lock_mode = mode;
+    return true;
+}
+
+
+bool QtLockedFile::unlock()
+{
+    if (!isOpen()) {
+        qWarning("QtLockedFile::unlock(): file is not opened");
+        return false;
+    }
+
+    if (!isLocked())
+        return true;
+
+    struct flock fl;
+    fl.l_whence = SEEK_SET;
+    fl.l_start = 0;
+    fl.l_len = 0;
+    fl.l_type = F_UNLCK;
+    int ret = fcntl(handle(), F_SETLKW, &fl);
+
+    if (ret == -1) {
+        qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
+        return false;
+    }
+
+    m_lock_mode = NoLock;
+    return true;
+}
+
+QtLockedFile::~QtLockedFile()
+{
+    if (isOpen())
+        unlock();
+}
+
+} // namespace SharedTools

src/3rdparty/qtlockedfile/qtlockedfile_win.cpp

@@ -0,0 +1,196 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtlockedfile.h"
+
+#include <qt_windows.h>
+#include <QFileInfo>
+
+namespace SharedTools {
+
+#define SEMAPHORE_PREFIX "QtLockedFile semaphore "
+#define MUTEX_PREFIX "QtLockedFile mutex "
+#define SEMAPHORE_MAX 100
+
+static QString errorCodeToString(DWORD errorCode)
+{
+    QString result;
+    char *data = 0;
+    FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+                    0, errorCode, 0,
+                    (char*)&data, 0, 0);
+    result = QString::fromLocal8Bit(data);
+    if (data != 0)
+        LocalFree(data);
+
+    if (result.endsWith('\n'))
+        result.truncate(result.length() - 1);
+
+    return result;
+}
+
+bool QtLockedFile::lock(LockMode mode, bool block)
+{
+    if (!isOpen()) {
+        qWarning("QtLockedFile::lock(): file is not opened");
+        return false;
+    }
+
+    if (mode == m_lock_mode)
+        return true;
+
+    if (m_lock_mode != 0)
+        unlock();
+
+    if (m_semaphore_hnd == 0) {
+        QFileInfo fi(*this);
+        QString sem_name = QString::fromLatin1(SEMAPHORE_PREFIX)
+                           + fi.absoluteFilePath().toLower();
+
+        m_semaphore_hnd = CreateSemaphoreW(0, SEMAPHORE_MAX, SEMAPHORE_MAX,
+                                           (TCHAR*)sem_name.utf16());
+
+        if (m_semaphore_hnd == 0) {
+            qWarning("QtLockedFile::lock(): CreateSemaphore: %s",
+                     errorCodeToString(GetLastError()).toLatin1().constData());
+            return false;
+        }
+    }
+
+    bool gotMutex = false;
+    int decrement;
+    if (mode == ReadLock) {
+        decrement = 1;
+    } else {
+        decrement = SEMAPHORE_MAX;
+        if (m_mutex_hnd == 0) {
+            QFileInfo fi(*this);
+            QString mut_name = QString::fromLatin1(MUTEX_PREFIX)
+                               + fi.absoluteFilePath().toLower();
+
+            m_mutex_hnd = CreateMutexW(NULL, FALSE, (TCHAR*)mut_name.utf16());
+
+            if (m_mutex_hnd == 0) {
+                qWarning("QtLockedFile::lock(): CreateMutex: %s",
+                         errorCodeToString(GetLastError()).toLatin1().constData());
+                return false;
+            }
+        }
+        DWORD res = WaitForSingleObject(m_mutex_hnd, block ? INFINITE : 0);
+        if (res == WAIT_TIMEOUT)
+            return false;
+        if (res == WAIT_FAILED) {
+            qWarning("QtLockedFile::lock(): WaitForSingleObject (mutex): %s",
+                     errorCodeToString(GetLastError()).toLatin1().constData());
+            return false;
+        }
+        gotMutex = true;
+    }
+
+    for (int i = 0; i < decrement; ++i) {
+        DWORD res = WaitForSingleObject(m_semaphore_hnd, block ? INFINITE : 0);
+        if (res == WAIT_TIMEOUT) {
+            if (i) {
+                // A failed nonblocking rw locking. Undo changes to semaphore.
+                if (ReleaseSemaphore(m_semaphore_hnd, i, NULL) == 0) {
+                    qWarning("QtLockedFile::unlock(): ReleaseSemaphore: %s",
+                             errorCodeToString(GetLastError()).toLatin1().constData());
+                    // Fall through
+                }
+            }
+            if (gotMutex)
+                ReleaseMutex(m_mutex_hnd);
+            return false;
+	}
+        if (res != WAIT_OBJECT_0) {
+            if (gotMutex)
+                ReleaseMutex(m_mutex_hnd);
+            qWarning("QtLockedFile::lock(): WaitForSingleObject (semaphore): %s",
+                        errorCodeToString(GetLastError()).toLatin1().constData());
+            return false;
+        }
+    }
+
+    m_lock_mode = mode;
+    if (gotMutex)
+        ReleaseMutex(m_mutex_hnd);
+    return true;
+}
+
+bool QtLockedFile::unlock()
+{
+    if (!isOpen()) {
+        qWarning("QtLockedFile::unlock(): file is not opened");
+        return false;
+    }
+
+    if (!isLocked())
+        return true;
+
+    int increment;
+    if (m_lock_mode == ReadLock)
+        increment = 1;
+    else
+        increment = SEMAPHORE_MAX;
+
+    DWORD ret = ReleaseSemaphore(m_semaphore_hnd, increment, 0);
+    if (ret == 0) {
+        qWarning("QtLockedFile::unlock(): ReleaseSemaphore: %s",
+                    errorCodeToString(GetLastError()).toLatin1().constData());
+        return false;
+    }
+
+    m_lock_mode = QtLockedFile::NoLock;
+    return true;
+}
+
+QtLockedFile::~QtLockedFile()
+{
+    if (isOpen())
+        unlock();
+    if (m_mutex_hnd != 0) {
+        DWORD ret = CloseHandle(m_mutex_hnd);
+        if (ret == 0) {
+            qWarning("QtLockedFile::~QtLockedFile(): CloseHandle (mutex): %s",
+                        errorCodeToString(GetLastError()).toLatin1().constData());
+        }
+        m_mutex_hnd = 0;
+    }
+    if (m_semaphore_hnd != 0) {
+        DWORD ret = CloseHandle(m_semaphore_hnd);
+        if (ret == 0) {
+            qWarning("QtLockedFile::~QtLockedFile(): CloseHandle (semaphore): %s",
+                        errorCodeToString(GetLastError()).toLatin1().constData());
+        }
+        m_semaphore_hnd = 0;
+    }
+}
+
+} // namespace SharedTools

src/3rdparty/qtsingleapplication/README.txt

@@ -0,0 +1,5 @@
+This is the src directory of the QtSingleApplication solution
+integrated over from Qt's Qt Creator project. 
+
+It additionally requires the QtLockedFile solution.
+

src/3rdparty/qtsingleapplication/qtlocalpeer.cpp

@@ -0,0 +1,173 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtlocalpeer.h"
+
+#include <QCoreApplication>
+#include <QTime>
+
+#if defined(Q_OS_WIN)
+#include <QLibrary>
+#include <qt_windows.h>
+typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
+static PProcessIdToSessionId pProcessIdToSessionId = 0;
+#endif
+
+#if defined(Q_OS_UNIX)
+#include <time.h>
+#include <unistd.h>
+#endif
+
+namespace SharedTools {
+
+const char *QtLocalPeer::ack = "ack";
+
+QtLocalPeer::QtLocalPeer(QObject *parent, const QString &appId)
+    : QObject(parent), id(appId)
+{
+    if (id.isEmpty())
+        id = QCoreApplication::applicationFilePath();  //### On win, check if this returns .../argv[0] without casefolding; .\MYAPP == .\myapp on Win
+
+    QByteArray idc = id.toUtf8();
+    quint16 idNum = qChecksum(idc.constData(), idc.size());
+    //### could do: two 16bit checksums over separate halves of id, for a 32bit result - improved uniqeness probability. Every-other-char split would be best.
+
+    socketName = QLatin1String("qtsingleapplication-")
+                 + QString::number(idNum, 16);
+#if defined(Q_OS_WIN)
+    if (!pProcessIdToSessionId) {
+        QLibrary lib("kernel32");
+        pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
+    }
+    if (pProcessIdToSessionId) {
+        DWORD sessionId = 0;
+        pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
+        socketName += QLatin1Char('-') + QString::number(sessionId, 16);
+    }
+#else
+    socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
+#endif
+
+    server = new QLocalServer(this);
+    QString lockName = QDir(QDir::tempPath()).absolutePath()
+                       + QLatin1Char('/') + socketName
+                       + QLatin1String("-lockfile");
+    lockFile.setFileName(lockName);
+    lockFile.open(QIODevice::ReadWrite);
+}
+
+bool QtLocalPeer::isClient()
+{
+    if (lockFile.isLocked())
+        return false;
+
+    if (!lockFile.lock(QtLockedFile::WriteLock, false))
+        return true;
+
+    if (!QLocalServer::removeServer(socketName))
+        qWarning("QtSingleCoreApplication: could not cleanup socket");
+    bool res = server->listen(socketName);
+    if (!res)
+        qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
+    QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
+    return false;
+}
+
+bool QtLocalPeer::sendMessage(const QString &message, int timeout)
+{
+    if (!isClient())
+        return false;
+
+    QLocalSocket socket;
+    bool connOk = false;
+    for (int i = 0; i < 2; i++) {
+        // Try twice, in case the other instance is just starting up
+        socket.connectToServer(socketName);
+        connOk = socket.waitForConnected(timeout/2);
+        if (connOk || i)
+            break;
+        int ms = 250;
+#if defined(Q_OS_WIN)
+        Sleep(DWORD(ms));
+#else
+        struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
+        nanosleep(&ts, NULL);
+#endif
+    }
+    if (!connOk)
+        return false;
+
+    QByteArray uMsg(message.toUtf8());
+    QDataStream ds(&socket);
+    ds.writeBytes(uMsg.constData(), uMsg.size());
+    bool res = socket.waitForBytesWritten(timeout);
+    res &= socket.waitForReadyRead(timeout); // wait for ack
+    res &= (socket.read(qstrlen(ack)) == ack);
+    return res;
+}
+
+void QtLocalPeer::receiveConnection()
+{
+    QLocalSocket* socket = server->nextPendingConnection();
+    if (!socket)
+        return;
+
+    // Why doesn't Qt have a blocking stream that takes care of this shait???
+    while (socket->bytesAvailable() < static_cast<int>(sizeof(quint32)))
+        socket->waitForReadyRead();
+    QDataStream ds(socket);
+    QByteArray uMsg;
+    quint32 remaining;
+    ds >> remaining;
+    uMsg.resize(remaining);
+    int got = 0;
+    char* uMsgBuf = uMsg.data();
+    //qDebug() << "RCV: remaining" << remaining;
+    do {
+        got = ds.readRawData(uMsgBuf, remaining);
+        remaining -= got;
+        uMsgBuf += got;
+        //qDebug() << "RCV: got" << got << "remaining" << remaining;
+    } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
+    //### error check: got<0
+    if (got < 0) {
+        qWarning() << "QtLocalPeer: Message reception failed" << socket->errorString();
+        delete socket;
+        return;
+    }
+    // ### async this
+    QString message = QString::fromUtf8(uMsg.constData(), uMsg.size());
+    socket->write(ack, qstrlen(ack));
+    socket->waitForBytesWritten(1000);
+    delete socket;
+    emit messageReceived(message); // ##(might take a long time to return)
+}
+
+} // namespace SharedTools

src/3rdparty/qtsingleapplication/qtlocalpeer.h

@@ -0,0 +1,66 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtlockedfile.h"
+
+#include <QLocalServer>
+#include <QLocalSocket>
+#include <QDir>
+
+namespace SharedTools {
+
+class QtLocalPeer : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit QtLocalPeer(QObject *parent = 0, const QString &appId = QString());
+    bool isClient();
+    bool sendMessage(const QString &message, int timeout);
+    QString applicationId() const
+        { return id; }
+
+Q_SIGNALS:
+    void messageReceived(const QString &message);
+
+protected Q_SLOTS:
+    void receiveConnection();
+
+protected:
+    QString id;
+    QString socketName;
+    QLocalServer* server;
+    QtLockedFile lockFile;
+
+private:
+    static const char* ack;
+};
+
+} // namespace SharedTools

src/3rdparty/qtsingleapplication/qtsingleapplication.cpp

@@ -0,0 +1,165 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtsingleapplication.h"
+#include "qtlocalpeer.h"
+
+#include <QWidget>
+#include <QFileOpenEvent>
+
+namespace SharedTools {
+
+void QtSingleApplication::sysInit(const QString &appId)
+{
+    actWin = 0;
+    firstPeer = new QtLocalPeer(this, appId);
+    connect(firstPeer, SIGNAL(messageReceived(QString)), SIGNAL(messageReceived(QString)));
+    pidPeer = new QtLocalPeer(this, appId + QLatin1Char('-') + QString::number(QCoreApplication::applicationPid(), 10));
+    connect(pidPeer, SIGNAL(messageReceived(QString)), SIGNAL(messageReceived(QString)));
+}
+
+
+QtSingleApplication::QtSingleApplication(int &argc, char **argv, bool GUIenabled)
+    : QApplication(argc, argv, GUIenabled)
+{
+    sysInit();
+}
+
+
+QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char **argv)
+    : QApplication(argc, argv)
+{
+    this->appId = appId;
+    sysInit(appId);
+}
+
+
+QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
+    : QApplication(argc, argv, type)
+{
+    sysInit();
+}
+
+
+#if defined(Q_WS_X11)
+QtSingleApplication::QtSingleApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE colormap)
+    : QApplication(dpy, visual, colormap)
+{
+    sysInit();
+}
+
+QtSingleApplication::QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
+    : QApplication(dpy, argc, argv, visual, cmap)
+{
+    sysInit();
+}
+
+QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId,
+    int argc, char **argv, Qt::HANDLE visual, Qt::HANDLE colormap)
+    : QApplication(dpy, argc, argv, visual, colormap)
+{
+    this->appId = appId;
+    sysInit(appId);
+}
+#endif
+
+bool QtSingleApplication::event(QEvent *event)
+{
+    if (event->type() == QEvent::FileOpen) {
+        QFileOpenEvent *foe = static_cast<QFileOpenEvent*>(event);
+        emit fileOpenRequest(foe->file());
+        return true;
+    }
+    return QApplication::event(event);
+}
+
+bool QtSingleApplication::isRunning(qint64 pid)
+{
+    if (pid == -1)
+        return firstPeer->isClient();
+
+    QtLocalPeer peer(this, appId + QLatin1Char('-') + QString::number(pid, 10));
+    return peer.isClient();
+}
+
+void QtSingleApplication::initialize(bool)
+{
+    firstPeer->isClient();
+    pidPeer->isClient();
+}
+
+bool QtSingleApplication::sendMessage(const QString &message, int timeout, qint64 pid)
+{
+    if (pid == -1)
+        return firstPeer->sendMessage(message, timeout);
+
+    QtLocalPeer peer(this, appId + QLatin1Char('-') + QString::number(pid, 10));
+    return peer.sendMessage(message, timeout);
+}
+
+QString QtSingleApplication::id() const
+{
+    return firstPeer->applicationId();
+}
+
+QString QtSingleApplication::applicationId() const
+{
+    return appId;
+}
+
+void QtSingleApplication::setActivationWindow(QWidget *aw, bool activateOnMessage)
+{
+    actWin = aw;
+    if (activateOnMessage) {
+        connect(firstPeer, SIGNAL(messageReceived(QString)), this, SLOT(activateWindow()));
+        connect(pidPeer, SIGNAL(messageReceived(QString)), this, SLOT(activateWindow()));
+    } else {
+        disconnect(firstPeer, SIGNAL(messageReceived(QString)), this, SLOT(activateWindow()));
+        disconnect(pidPeer, SIGNAL(messageReceived(QString)), this, SLOT(activateWindow()));
+    }
+}
+
+
+QWidget* QtSingleApplication::activationWindow() const
+{
+    return actWin;
+}
+
+
+void QtSingleApplication::activateWindow()
+{
+    if (actWin) {
+        actWin->setWindowState(actWin->windowState() & ~Qt::WindowMinimized);
+        actWin->raise();
+        actWin->activateWindow();
+    }
+}
+
+} // namespace SharedTools

src/3rdparty/qtsingleapplication/qtsingleapplication.h

@@ -0,0 +1,85 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include <QApplication>
+
+namespace SharedTools {
+
+class QtLocalPeer;
+
+class QtSingleApplication : public QApplication
+{
+    Q_OBJECT
+
+public:
+    QtSingleApplication(int &argc, char **argv, bool GUIenabled = true);
+    QtSingleApplication(const QString &id, int &argc, char **argv);
+    QtSingleApplication(int &argc, char **argv, Type type);
+#if defined(Q_WS_X11)
+    explicit QtSingleApplication(Display *dpy, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
+    QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0);
+#endif
+
+    bool isRunning(qint64 pid = -1);
+
+    QString id() const;
+
+    void setActivationWindow(QWidget* aw, bool activateOnMessage = true);
+    QWidget* activationWindow() const;
+    bool event(QEvent *event);
+
+    QString applicationId() const;
+
+public Q_SLOTS:
+    bool sendMessage(const QString &message, int timeout = 5000, qint64 pid = -1);
+    void activateWindow();
+
+//Obsolete methods:
+public:
+    void initialize(bool = true);
+
+#if defined(Q_WS_X11)
+    QtSingleApplication(Display* dpy, const QString &id, int argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
+#endif
+// end obsolete methods
+
+Q_SIGNALS:
+    void messageReceived(const QString &message);
+    void fileOpenRequest(const QString &file);
+
+private:
+    void sysInit(const QString &appId = QString());
+    QtLocalPeer *firstPeer;
+    QtLocalPeer *pidPeer;
+    QWidget *actWin;
+    QString appId;
+};
+
+} // namespace SharedTools

src/3rdparty/qtsingleapplication/qtsinglecoreapplication.cpp

@@ -0,0 +1,69 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include "qtsinglecoreapplication.h"
+#include "qtlocalpeer.h"
+
+namespace SharedTools {
+
+QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv)
+    : QCoreApplication(argc, argv)
+{
+    peer = new QtLocalPeer(this);
+    connect(peer, SIGNAL(messageReceived(QString)), SIGNAL(messageReceived(QString)));
+}
+
+
+QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv)
+    : QCoreApplication(argc, argv)
+{
+    peer = new QtLocalPeer(this, appId);
+    connect(peer, SIGNAL(messageReceived(QString)), SIGNAL(messageReceived(QString)));
+}
+
+
+bool QtSingleCoreApplication::isRunning()
+{
+    return peer->isClient();
+}
+
+
+bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout)
+{
+    return peer->sendMessage(message, timeout);
+}
+
+
+QString QtSingleCoreApplication::id() const
+{
+    return peer->applicationId();
+}
+
+} // namespace SharedTools

src/3rdparty/qtsingleapplication/qtsinglecoreapplication.h

@@ -0,0 +1,60 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: http://www.qt-project.org/
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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.
+**
+**
+**************************************************************************/
+
+#include <QCoreApplication>
+
+namespace SharedTools {
+
+class QtLocalPeer;
+
+class QtSingleCoreApplication : public QCoreApplication
+{
+    Q_OBJECT
+
+public:
+    QtSingleCoreApplication(int &argc, char **argv);
+    QtSingleCoreApplication(const QString &id, int &argc, char **argv);
+
+    bool isRunning();
+    QString id() const;
+
+public Q_SLOTS:
+    bool sendMessage(const QString &message, int timeout = 5000);
+
+
+Q_SIGNALS:
+    void messageReceived(const QString &message);
+
+
+private:
+    QtLocalPeer* peer;
+};
+
+} // namespace SharedTools

src/CMakeLists.txt

@@ -19,6 +19,36 @@ mirall/owncloudcredentialspage.ui
 mirall/sslerrorsdialog.ui
 )
 
+set(3rdparty_SRC
+3rdparty/qtsingleapplication/qtsingleapplication.cpp
+3rdparty/qtsingleapplication/qtlocalpeer.h
+3rdparty/qtsingleapplication/qtlocalpeer.cpp
+3rdparty/qtsingleapplication/qtsingleapplication.h
+3rdparty/qtsingleapplication/qtsinglecoreapplication.h
+3rdparty/qtsingleapplication/qtsinglecoreapplication.cpp
+
+3rdparty/qtlockedfile/qtlockedfile.h
+3rdparty/qtlockedfile/qtlockedfile.cpp
+)
+
+set(3rdparty_HEADER
+3rdparty/qtsingleapplication/qtlocalpeer.h
+3rdparty/qtsingleapplication/qtsingleapplication.h
+3rdparty/qtsingleapplication/qtsinglecoreapplication.h
+)
+qt4_wrap_cpp(3rdparty_MOC ${3rdparty_HEADER})
+
+if(NOT WIN32) 
+	list(APPEND 3rdparty_SRC 3rdparty/qtlockedfile/qtlockedfile_unix.cpp)
+else()
+	list(APPEND 3rdparty_SRC 3rdparty/qtlockedfile/qtlockedfile_win.cpp )
+endif()
+
+set(3rdparty_INC
+    ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/qtlockedfile
+    ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/qtsingleapplication
+    )
+
 qt4_wrap_ui(mirall_UI_SRCS ${mirall_UI})
 
 set(libsync_SRCS
@@ -106,6 +136,7 @@ endif()
 
 # csync is required.
 include_directories(${CSYNC_INCLUDE_DIR}/csync ${CSYNC_INCLUDE_DIR} ${CMAKE_BINARY_DIR})
+include_directories(${3rdparty_INC})
 
 qt4_wrap_cpp(mirallMoc ${mirall_HEADERS})
 
@@ -119,6 +150,8 @@ set( final_src
     ${mirallMoc}
     ${mirall_HEADERS}
     ${mirall_I18N}
+    ${3rdparty_SRC}
+    ${3rdparty_MOC}
 )
 
 # add executable icon on windows and osx

src/main.cpp

@@ -19,7 +19,16 @@ int main(int argc, char **argv)
     Q_INIT_RESOURCE(mirall);
 
     Mirall::Application app(argc, argv);
+    app.initialize();
+   
+    qint64 pid = -1;
 
+    // if the application is already running, notify it.
+    if( app.isRunning() ) {
+        if( app.sendMessage( QLatin1String("A message to the master"), 5000, pid ))
+	   return 0;
+    }
+    // if help requested, show on command line and exit.
     if( ! app.giveHelp() )
         return app.exec();
 

src/mirall/application.cpp

@@ -66,7 +66,7 @@ void csyncLogCatcher(const char *msg)
 // ----------------------------------------------------------------------------------
 
 Application::Application(int &argc, char **argv) :
-    QApplication(argc, argv),
+    SharedTools::QtSingleApplication(argc, argv),
     _tray(0),
 #if QT_VERSION >= 0x040700
     _networkMgr(new QNetworkConfigurationManager(this)),
@@ -167,6 +167,9 @@ Application::Application(int &argc, char **argv) :
     setupSystemTray();
     processEvents();
 
+    QObject::connect( this, SIGNAL(messageReceived(QString)),
+                         this, SLOT(slotOpenStatus()) );
+
     QTimer::singleShot( 0, this, SLOT( slotStartFolderSetup() ));
 
     MirallConfigFile cfg;
@@ -221,6 +224,13 @@ void Application::slotOwnCloudFound( const QString& url, const QString& versionS
     MirallConfigFile cfgFile;
     cfgFile.setOwnCloudVersion( version );
 
+    // disconnect from ownCloudInfo
+    disconnect( ownCloudInfo::instance(),SIGNAL(ownCloudInfoFound(QString,QString,QString,QString)),
+                this, SLOT(slotOwnCloudFound(QString,QString,QString,QString)));
+
+    disconnect( ownCloudInfo::instance(),SIGNAL(noOwncloudFound(QNetworkReply*)),
+                this, SLOT(slotNoOwnCloudFound(QNetworkReply*)));
+
     QTimer::singleShot( 0, this, SLOT( slotCheckAuthentication() ));
 }
 
@@ -277,6 +287,10 @@ void Application::slotAuthCheck( const QString& ,QNetworkReply *reply )
         }
         _actionAddFolder->setEnabled( true );
     }
+
+    // disconnect from ownCloud Info signals
+    disconnect( ownCloudInfo::instance(),SIGNAL(ownCloudDirExists(QString,QNetworkReply*)),
+             this,SLOT(slotAuthCheck(QString,QNetworkReply*)));
     setupContextMenu();
 }
 
@@ -524,8 +538,8 @@ void Application::slotRemoveFolder( const QString& alias )
         return;
     }
     Folder *f = _folderMan->folder(alias);
-    if( f && _overallStatusStrings.contains( f )) {
-        _overallStatusStrings.remove( f );
+    if( f && _overallStatusStrings.contains( f->alias() )) {
+        _overallStatusStrings.remove( f->alias() );
     }
 
     _folderMan->slotRemoveFolder( alias );
@@ -650,7 +664,7 @@ void Application::slotSyncStateChange( const QString& alias )
     }
     computeOverallSyncStatus();
 
-    qDebug() << "Sync state changed for folder " << alias << ": "  << result.localRunOnly();
+    qDebug() << "Sync state changed for folder " << alias << ": "  << result.statusString();
 }
 
 void Application::computeOverallSyncStatus()
@@ -661,8 +675,8 @@ void Application::computeOverallSyncStatus()
     QString trayMessage;
     Folder::Map map = _folderMan->map();
 
-    foreach ( Folder *syncedFolder, map ) {
-        QString folderMessage = _overallStatusStrings[syncedFolder];
+    foreach ( Folder *syncedFolder, map.values() ) {
+        QString folderMessage = _overallStatusStrings[syncedFolder->alias()];
 
         SyncResult folderResult = syncedFolder->syncResult();
         SyncResult::Status syncStatus = folderResult.status();
@@ -685,8 +699,10 @@ void Application::computeOverallSyncStatus()
                     overallResult.setStatus( SyncResult::SyncRunning );
                     break;
                 case SyncResult::Success:
-                    folderMessage = tr( "Last Sync was successful." );
-                    overallResult.setStatus( SyncResult::Success );
+                    if( overallResult.status() == SyncResult::Undefined ) {
+                        folderMessage = tr( "Last Sync was successful." );
+                        overallResult.setStatus( SyncResult::Success );
+                    }
                     break;
                 case SyncResult::Error:
                     overallResult.setStatus( SyncResult::Error );
@@ -707,8 +723,10 @@ void Application::computeOverallSyncStatus()
                 folderMessage = tr( "Sync is paused." );
             }
         }
-        if( folderMessage != _overallStatusStrings[syncedFolder] ) {
-            _overallStatusStrings[syncedFolder] = QString("Folder %1: %2").arg(syncedFolder->alias()).arg(folderMessage);
+        qDebug() << "Folder in overallStatus Message: " << syncedFolder << " with name " << syncedFolder->alias();
+        QString msg = QString("Folder %1: %2").arg(syncedFolder->alias()).arg(folderMessage);
+        if( msg != _overallStatusStrings[syncedFolder->alias()] ) {
+            _overallStatusStrings[syncedFolder->alias()] = msg;
         }
     }
 

src/mirall/application.h

@@ -19,6 +19,8 @@
 #include <QSystemTrayIcon>
 #include <QNetworkReply>
 
+#include "qtsingleapplication.h"
+
 #include "mirall/syncresult.h"
 #include "mirall/folder.h"
 #include "mirall/logbrowser.h"
@@ -40,7 +42,7 @@ class OwncloudSetupWizard;
 class ownCloudInfo;
 class UpdateDetector;
 
-class Application : public QApplication
+class Application : public SharedTools::QtSingleApplication
 {
     Q_OBJECT
 public:
@@ -109,7 +111,7 @@ private:
     Theme *_theme;
     QSignalMapper *_folderOpenActionMapper;
     UpdateDetector *_updateDetector;
-    QMap<Folder*, QString> _overallStatusStrings;
+    QMap<QString, QString> _overallStatusStrings;
     LogBrowser *_logBrowser;
     bool        _helpOnly;
 };