Add ukui-search-service.

3rd-parties/SingleApplication/CHANGELOG.md

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+Changelog
+=========
+
+__3.0.18__
+----------
+
+* Fallback to standard QApplication class on iOS and Android systems where
+  the library is not supported.
+
+__3.0.17__
+----------
+
+* Fixed compilation warning/error caused by `geteuid()` on unix based systems.
+
+   _Iakov Kirilenko_
+
+* Added CMake support
+
+   _Hennadii Chernyshchyk_
+
+__3.0.16__
+----------
+
+* Use geteuid and getpwuid to get username on Unix, fallback to environment variable.
+
+   _Jonas Kvinge_
+
+__3.0.15__
+----------
+
+* Bug Fix: sendMessage() might return false even though data was actually written.
+
+   _Jonas Kvinge_
+
+__3.0.14__
+----------
+
+* Fixed uninitialised variables in the `SingleApplicationPrivate` constructor.
+
+__3.0.13a__
+----------
+
+* Process socket events asynchronously
+* Fix undefined variable error on Windows
+
+   _Francis Giraldeau_
+
+__3.0.12a__
+----------
+
+* Removed signal handling.
+
+__3.0.11a__
+----------
+
+* Fixed bug where the message sent by the second process was not received
+  correctly when the message is sent immediately following a connection.
+
+   _Francis Giraldeau_
+
+* Refactored code and implemented shared memory block consistency checks
+  via `qChecksum()` (CRC-16).
+* Explicit `qWarning` and `qCritical` when the library is unable to initialise
+  correctly.
+
+__3.0.10__
+----------
+
+* Removed C style casts and eliminated all clang warnings. Fixed `instanceId`
+  reading from only one byte in the message deserialization. Cleaned up
+  serialization code using `QDataStream`. Changed connection type to use
+  `quint8 enum` rather than `char`.
+* Renamed `SingleAppConnectionType` to `ConnectionType`. Added initialization
+  values to all `ConnectionType` enum cases.
+
+    _Jedidiah Buck McCready_
+
+__3.0.9__
+---------
+
+*   Added SingleApplicationPrivate::primaryPid() as a solution to allow
+    bringing the primary window of an application to the foreground on
+    Windows.
+
+    _Eelco van Dam from Peacs BV_
+
+__3.0.8__
+---------
+
+*   Bug fix - changed QApplication::instance() to QCoreApplication::instance()
+
+    _Evgeniy Bazhenov_
+
+__3.0.7a__
+----------
+
+*   Fixed compilation error with Mingw32 in MXE thanks to Vitaly Tonkacheyev.
+*   Removed QMutex used for thread safe behaviour. The implementation now uses
+    QCoreApplication::instance() to get an instance to SingleApplication for
+    memory deallocation.
+
+__3.0.6a__
+----------
+
+*   Reverted GetUserName API usage on Windows. Fixed bug with missing library.
+*   Fixed bug in the Calculator example, preventing it's window to be raised
+    on Windows.
+
+    Special thanks to Charles Gunawan.
+
+__3.0.5a__
+----------
+
+*   Fixed a memory leak in the SingleApplicationPrivate destructor.
+
+    _Sergei Moiseev_
+
+__3.0.4a__
+----------
+
+*   Fixed shadow and uninitialised variable warnings.
+
+    _Paul Walmsley_
+
+__3.0.3a__
+----------
+
+*   Removed Microsoft Windows specific code for getting username due to
+    multiple problems and compiler differences on Windows platforms. On
+    Windows the shared memory block in User mode now includes the user's
+    home path (which contains the user's username).
+
+*   Explicitly getting absolute path of the user's home directory as on Unix
+    a relative path (`~`) may be returned.
+
+__3.0.2a__
+----------
+
+*   Fixed bug on Windows when username containing wide characters causes the
+    library to crash.
+
+    _Le Liu_
+
+__3.0.1a__
+----------
+
+*   Allows the application path and version to be excluded from the server name
+    hash. The following flags were added for this purpose:
+      * `SingleApplication::Mode::ExcludeAppVersion`
+      * `SingleApplication::Mode::ExcludeAppPath`
+*   Allow a non elevated process to connect to a local server created by an
+    elevated process run by the same user on Windows
+*   Fixes a problem with upper case letters in paths on Windows
+
+    _Le Liu_
+
+__v3.0a__
+---------
+
+*   Deprecated secondary instances count.
+*   Added a sendMessage() method to send a message to the primary instance.
+*   Added a receivedMessage() signal, emitted when a message is received from a
+    secondary instance.
+*   The SingleApplication constructor's third parameter is now a bool
+    specifying if the current instance should be allowed to run as a secondary
+    instance if there is already a primary instance.
+*   The SingleApplication constructor accept a fourth parameter specifying if
+    the SingleApplication block should be User-wide or System-wide.
+*   SingleApplication no longer relies on `applicationName` and
+    `organizationName` to be set. It instead concatenates all of the following
+    data and computes a `SHA256` hash which is used as the key of the
+    `QSharedMemory` block and the `QLocalServer`. Since at least
+    `applicationFilePath` is always present there is no need to explicitly set
+    any of the following prior to initialising `SingleApplication`.
+      * `QCoreApplication::applicationName`
+      * `QCoreApplication::applicationVersion`
+      * `QCoreApplication::applicationFilePath`
+      * `QCoreApplication::organizationName`
+      * `QCoreApplication::organizationDomain`
+      * User name or home directory path if in User mode
+*   The primary instance is no longer notified when a secondary instance had
+    been started by default. A `Mode` flag for this feature exists.
+*   Added `instanceNumber()` which represents a unique identifier for each
+    secondary instance started. When called from the primary instance will
+    return `0`.
+
+__v2.4__
+--------
+
+*   Stability improvements
+*   Support for secondary instances.
+*   The library now recovers safely after the primary process has crashed
+and the shared memory had not been deleted.
+
+__v2.3__
+--------
+
+*   Improved pimpl design and inheritance safety.
+
+    _Vladislav Pyatnichenko_
+
+__v2.2__
+--------
+
+*   The `QAPPLICATION_CLASS` macro can now be defined in the file including the
+Single Application header or with a `DEFINES+=` statement in the project file.
+
+__v2.1__
+--------
+
+*   A race condition can no longer occur when starting two processes nearly
+    simultaneously.
+
+    Fix issue [#3](https://github.com/itay-grudev/SingleApplication/issues/3)
+
+__v2.0__
+--------
+
+*   SingleApplication is now being passed a reference to `argc` instead of a
+    copy.
+
+    Fix issue [#1](https://github.com/itay-grudev/SingleApplication/issues/1)
+
+*   Improved documentation.

3rd-parties/SingleApplication/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.1.0)
+
+project(SingleApplication)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOMOC ON)
+
+# SingleApplication base class
+set(QAPPLICATION_CLASS QCoreApplication CACHE STRING "Inheritance class for SingleApplication")
+set_property(CACHE QAPPLICATION_CLASS PROPERTY STRINGS QApplication QGuiApplication QCoreApplication)
+
+# Libary target
+add_library(${PROJECT_NAME} STATIC
+    singleapplication.cpp
+    singleapplication_p.cpp
+    )
+
+# Find dependencies
+find_package(Qt5Network)
+if(QAPPLICATION_CLASS STREQUAL QApplication)
+    find_package(Qt5 COMPONENTS Widgets REQUIRED)
+elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
+    find_package(Qt5 COMPONENTS Gui REQUIRED)
+else()
+    find_package(Qt5 COMPONENTS Core REQUIRED)
+endif()
+add_compile_definitions(QAPPLICATION_CLASS=${QAPPLICATION_CLASS})
+
+# Link dependencies
+target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Network)
+if(QAPPLICATION_CLASS STREQUAL QApplication)
+    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Widgets)
+elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
+    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Gui)
+else()
+    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Core)
+endif()
+
+if(WIN32)
+    target_link_libraries(${PROJECT_NAME} PRIVATE advapi32)
+endif()
+
+target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

3rd-parties/SingleApplication/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) Itay Grudev 2015 - 2016
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+Note: Some of the examples include code not distributed under the terms of the
+MIT License.

3rd-parties/SingleApplication/README.md

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+SingleApplication
+=================
+
+This is a replacement of the QtSingleApplication for `Qt5`.
+
+Keeps the Primary Instance of your Application and kills each subsequent
+instances. It can (if enabled) spawn secondary (non-related to the primary)
+instances and can send data to the primary instance from secondary instances.
+
+Usage
+-----
+
+The `SingleApplication` class inherits from whatever `Q[Core|Gui]Application`
+class you specify via the `QAPPLICATION_CLASS` macro (`QCoreApplication` is the
+default). Further usage is similar to the use of the `Q[Core|Gui]Application`
+classes.
+
+The library sets up a `QLocalServer` and a `QSharedMemory` block. The first
+instance of your Application is your Primary Instance. It would check if the
+shared memory block exists and if not it will start a `QLocalServer` and listen
+for connections. Each subsequent instance of your application would check if the
+shared memory block exists and if it does, it will connect to the QLocalServer
+to notify the primary instance that a new instance had been started, after which
+it would terminate with status code `0`. In the Primary Instance
+`SingleApplication` would emit the `instanceStarted()` signal upon detecting
+that a new instance had been started.
+
+The library uses `stdlib` to terminate the program with the `exit()` function.
+
+You can use the library as if you use any other `QCoreApplication` derived
+class:
+
+```cpp
+#include <QApplication>
+#include <SingleApplication.h>
+
+int main( int argc, char* argv[] )
+{
+    SingleApplication app( argc, argv );
+
+    return app.exec();
+}
+```
+
+To include the library files I would recommend that you add it as a git
+submodule to your project and include it's contents with a `.pri` file. Here is
+how:
+
+```bash
+git submodule add git@github.com:itay-grudev/SingleApplication.git singleapplication
+```
+
+**Qmake:**
+
+Then include the `singleapplication.pri` file in your `.pro` project file.
+
+```qmake
+include(singleapplication/singleapplication.pri)
+DEFINES += QAPPLICATION_CLASS=QApplication
+```
+
+**CMake:**
+
+Then include the subdirectory in your `CMakeLists.txt` project file.
+
+```cmake
+set(QAPPLICATION_CLASS QApplication CACHE STRING "Inheritance class for SingleApplication")
+add_subdirectory(src/third-party/singleapplication)
+```
+
+Also don't forget to specify which `QCoreApplication` class your app is using if it
+is not `QCoreApplication` as in examples above.
+
+The `Instance Started` signal
+------------------------
+
+The SingleApplication class implements a `instanceStarted()` signal. You can
+bind to that signal to raise your application's window when a new instance had
+been started, for example.
+
+```cpp
+// window is a QWindow instance
+QObject::connect(
+    &app,
+    &SingleApplication::instanceStarted,
+    &window,
+    &QWindow::raise
+);
+```
+
+Using `SingleApplication::instance()` is a neat way to get the
+`SingleApplication` instance for binding to it's signals anywhere in your
+program.
+
+__Note:__ On Windows the ability to bring the application windows to the
+foreground is restricted. See [Windows specific implementations](Windows.md)
+for a workaround and an example implementation.
+
+
+Secondary Instances
+-------------------
+
+If you want to be able to launch additional Secondary Instances (not related to
+your Primary Instance) you have to enable that with the third parameter of the
+`SingleApplication` constructor. The default is `false` meaning no Secondary
+Instances. Here is an example of how you would start a Secondary Instance send
+a message with the command line arguments to the primary instance and then shut
+down.
+
+```cpp
+int main(int argc, char *argv[])
+{
+    SingleApplication app( argc, argv, true );
+
+    if( app.isSecondary() ) {
+        app.sendMessage(  app.arguments().join(' ')).toUtf8() );
+        app.exit( 0 );
+    }
+
+    return app.exec();
+}
+```
+
+*__Note:__ A secondary instance won't cause the emission of the
+`instanceStarted()` signal by default. See `SingleApplication::Mode` for more
+details.*
+
+You can check whether your instance is a primary or secondary with the following
+methods:
+
+```cpp
+app.isPrimary();
+// or
+app.isSecondary();
+```
+
+*__Note:__ If your Primary Instance is terminated a newly launched instance
+will replace the Primary one even if the Secondary flag has been set.*
+
+API
+---
+
+### Members
+
+```cpp
+SingleApplication::SingleApplication( int &argc, char *argv[], bool allowSecondary = false, Options options = Mode::User, int timeout = 100 )
+```
+
+Depending on whether `allowSecondary` is set, this constructor may terminate
+your app if there is already a primary instance running. Additional `Options`
+can be specified to set whether the SingleApplication block should work
+user-wide or system-wide. Additionally the `Mode::SecondaryNotification` may be
+used to notify the primary instance whenever a secondary instance had been
+started (disabled by default). `timeout` specifies the maximum time in
+milliseconds to wait for blocking operations.
+
+*__Note:__ `argc` and `argv` may be changed as Qt removes arguments that it
+recognizes.*
+
+*__Note:__ `Mode::SecondaryNotification` only works if set on both the primary
+and the secondary instance.*
+
+*__Note:__ Operating system can restrict the shared memory blocks to the same
+user, in which case the User/System modes will have no effect and the block will
+be user wide.*
+
+---
+
+```cpp
+bool SingleApplication::sendMessage( QByteArray message, int timeout = 100 )
+```
+
+Sends `message` to the Primary Instance. Uses `timeout` as a the maximum timeout
+in milliseconds for blocking functions
+
+---
+
+```cpp
+bool SingleApplication::isPrimary()
+```
+
+Returns if the instance is the primary instance.
+
+---
+
+```cpp
+bool SingleApplication::isSecondary()
+```
+Returns if the instance is a secondary instance.
+
+---
+
+```cpp
+quint32 SingleApplication::instanceId()
+```
+
+Returns a unique identifier for the current instance.
+
+---
+
+```cpp
+qint64 SingleApplication::primaryPid()
+```
+
+Returns the process ID (PID) of the primary instance.
+
+### Signals
+
+```cpp
+void SingleApplication::instanceStarted()
+```
+
+Triggered whenever a new instance had been started, except for secondary
+instances if the `Mode::SecondaryNotification` flag is not specified.
+
+---
+
+```cpp
+void SingleApplication::receivedMessage( quint32 instanceId, QByteArray message )
+```
+
+Triggered whenever there is a message received from a secondary instance.
+
+---
+
+### Flags
+
+```cpp
+enum SingleApplication::Mode
+```
+
+*   `Mode::User` - The SingleApplication block should apply user wide. This adds
+    user specific data to the key used for the shared memory and server name.
+    This is the default functionality.
+*   `Mode::System` – The SingleApplication block applies system-wide.
+*   `Mode::SecondaryNotification` – Whether to trigger `instanceStarted()` even
+    whenever secondary instances are started.
+*   `Mode::ExcludeAppPath` – Excludes the application path from the server name
+    (and memory block) hash.
+*   `Mode::ExcludeAppVersion` – Excludes the application version from the server
+    name (and memory block) hash.
+
+*__Note:__ `Mode::SecondaryNotification` only works if set on both the primary
+and the secondary instance.*
+
+*__Note:__ Operating system can restrict the shared memory blocks to the same
+user, in which case the User/System modes will have no effect and the block will
+be user wide.*
+
+---
+
+Versioning
+----------
+
+Each major version introduces either very significant changes or is not
+backwards compatible with the previous version. Minor versions only add
+additional features, bug fixes or performance improvements and are backwards
+compatible with the previous release. See [`CHANGELOG.md`](CHANGELOG.md) for
+more details.
+
+Implementation
+--------------
+
+The library is implemented with a QSharedMemory block which is thread safe and
+guarantees a race condition will not occur. It also uses a QLocalSocket to
+notify the main process that a new instance had been spawned and thus invoke the
+`instanceStarted()` signal and for messaging the primary instance.
+
+Additionally the library can recover from being forcefully killed on *nix
+systems and will reset the memory block given that there are no other
+instances running.
+
+License
+-------
+This library and it's supporting documentation are released under
+`The MIT License (MIT)` with the exception of the Qt calculator examples which
+is distributed under the BSD license.

3rd-parties/SingleApplication/Windows.md

@@ -0,0 +1,46 @@
+Windows Specific Implementations
+================================
+
+Setting the foreground window
+-----------------------------
+
+In the `instanceStarted()` example in the `README` we demonstrated how an
+application can bring it's primary instance window whenever a second copy
+of the application is started.
+
+On Windows the ability to bring the application windows to the foreground is
+restricted, see [`AllowSetForegroundWindow()`][AllowSetForegroundWindow] for more
+details.
+
+The background process (the primary instance) can bring its windows to the
+foreground if it is allowed by the current foreground process (the secondary
+instance). To bypass this `SingleApplication` must be initialized with the
+`allowSecondary` parameter set to `true` and the `options` parameter must
+include `Mode::SecondaryNotification`, See `SingleApplication::Mode` for more
+details.
+
+Here is an example:
+
+```cpp
+if( app.isSecondary() ) {
+    // This API requires LIBS += User32.lib to be added to the project
+    AllowSetForegroundWindow( DWORD( app.primaryPid() ) );
+}
+
+if( app.isPrimary() ) {
+    QObject::connect(
+        &app,
+        &SingleApplication::instanceStarted,
+        this,
+        &App::instanceStarted
+    );
+}
+```
+
+```cpp
+void App::instanceStarted() {
+    QApplication::setActiveWindow( [window/widget to set to the foreground] );
+}
+```
+
+[AllowSetForegroundWindow]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms632668.aspx

3rd-parties/SingleApplication/singleapplication.cpp

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+// The MIT License (MIT)
+//
+// Copyright (c) Itay Grudev 2015 - 2018
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include <QtCore/QTime>
+#include <QtCore/QThread>
+#include <QtCore/QDateTime>
+#include <QtCore/QByteArray>
+#include <QtCore/QSharedMemory>
+
+#include "singleapplication.h"
+#include "singleapplication_p.h"
+
+/**
+ * @brief Constructor. Checks and fires up LocalServer or closes the program
+ * if another instance already exists
+ * @param argc
+ * @param argv
+ * @param {bool} allowSecondaryInstances
+ */
+SingleApplication::SingleApplication(int &argc, char *argv[], const char* appName, bool allowSecondary, Options options, int timeout )
+    : app_t( argc, argv ), d_ptr( new SingleApplicationPrivate( this ) )
+{
+    Q_D(SingleApplication);
+
+#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
+    // On Android and iOS since the library is not supported fallback to
+    // standard QApplication behaviour by simply returning at this point.
+    qWarning() << "SingleApplication is not supported on Android and iOS systems.";
+    return;
+#endif
+
+    // Store the current mode of the program
+    d->options = options;
+
+    // Generating an application ID used for identifying the shared memory
+    // block and QLocalServer
+    d->genBlockServerName(appName);
+
+#ifdef Q_OS_UNIX
+    // By explicitly attaching it and then deleting it we make sure that the
+    // memory is deleted even after the process has crashed on Unix.
+    d->memory = new QSharedMemory( d->blockServerName );
+    d->memory->attach();
+    delete d->memory;
+#endif
+    // Guarantee thread safe behaviour with a shared memory block.
+    d->memory = new QSharedMemory( d->blockServerName );
+
+    // Create a shared memory block
+    if( d->memory->create( sizeof( InstancesInfo ) ) ) {
+        // Initialize the shared memory block
+        d->memory->lock();
+        d->initializeMemoryBlock();
+        d->memory->unlock();
+    } else {
+        // Attempt to attach to the memory segment
+        if( ! d->memory->attach() ) {
+            qCritical() << "SingleApplication: Unable to attach to shared memory block.";
+            qCritical() << d->memory->errorString();
+            delete d;
+            ::exit( EXIT_FAILURE );
+        }
+    }
+
+    InstancesInfo* inst = static_cast<InstancesInfo*>( d->memory->data() );
+    QTime time;
+    time.start();
+
+    // Make sure the shared memory block is initialised and in consistent state
+    while( true ) {
+        d->memory->lock();
+
+        if( d->blockChecksum() == inst->checksum ) break;
+
+        if( time.elapsed() > 5000 ) {
+            qWarning() << "SingleApplication: Shared memory block has been in an inconsistent state from more than 5s. Assuming primary instance failure.";
+            d->initializeMemoryBlock();
+        }
+
+        d->memory->unlock();
+
+        // Random sleep here limits the probability of a collision between two racing apps
+        qsrand( QDateTime::currentMSecsSinceEpoch() % std::numeric_limits<uint>::max() );
+        QThread::sleep( 8 + static_cast <unsigned long>( static_cast <float>( qrand() ) / RAND_MAX * 10 ) );
+    }
+
+    if( inst->primary == false) {
+        d->startPrimary();
+        d->memory->unlock();
+        return;
+    }
+
+    // Check if another instance can be started
+    if( allowSecondary ) {
+        inst->secondary += 1;
+        inst->checksum = d->blockChecksum();
+        d->instanceNumber = inst->secondary;
+        d->startSecondary();
+        if( d->options & Mode::SecondaryNotification ) {
+            d->connectToPrimary( timeout, SingleApplicationPrivate::SecondaryInstance );
+        }
+        d->memory->unlock();
+        return;
+    }
+
+    d->memory->unlock();
+
+    d->connectToPrimary( timeout, SingleApplicationPrivate::NewInstance );
+
+    delete d;
+
+    ::exit( EXIT_SUCCESS );
+}
+
+/**
+ * @brief Destructor
+ */
+SingleApplication::~SingleApplication()
+{
+    Q_D(SingleApplication);
+    delete d;
+}
+
+bool SingleApplication::isPrimary()
+{
+    Q_D(SingleApplication);
+    return d->server != nullptr;
+}
+
+bool SingleApplication::isSecondary()
+{
+    Q_D(SingleApplication);
+    return d->server == nullptr;
+}
+
+quint32 SingleApplication::instanceId()
+{
+    Q_D(SingleApplication);
+    return d->instanceNumber;
+}
+
+qint64 SingleApplication::primaryPid()
+{
+    Q_D(SingleApplication);
+    return d->primaryPid();
+}
+
+bool SingleApplication::sendMessage( QByteArray message, int timeout )
+{
+    Q_D(SingleApplication);
+
+    // Nobody to connect to
+    if( isPrimary() ) return false;
+
+    // Make sure the socket is connected
+    d->connectToPrimary( timeout,  SingleApplicationPrivate::Reconnect );
+
+    d->socket->write( message );
+    bool dataWritten = d->socket->waitForBytesWritten( timeout );
+    d->socket->flush();
+    return dataWritten;
+}

3rd-parties/SingleApplication/singleapplication.h

@@ -0,0 +1,135 @@
+// The MIT License (MIT)
+//
+// Copyright (c) Itay Grudev 2015 - 2018
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#ifndef SINGLE_APPLICATION_H
+#define SINGLE_APPLICATION_H
+
+#include <QtCore/QtGlobal>
+#include <QtNetwork/QLocalSocket>
+
+#ifndef QAPPLICATION_CLASS
+#define QAPPLICATION_CLASS QCoreApplication
+#endif
+
+#include QT_STRINGIFY(QAPPLICATION_CLASS)
+
+class SingleApplicationPrivate;
+
+/**
+ * @brief The SingleApplication class handles multiple instances of the same
+ * Application
+ * @see QCoreApplication
+ */
+class SingleApplication : public QAPPLICATION_CLASS
+{
+    Q_OBJECT
+
+    typedef QAPPLICATION_CLASS app_t;
+
+public:
+    /**
+     * @brief Mode of operation of SingleApplication.
+     * Whether the block should be user-wide or system-wide and whether the
+     * primary instance should be notified when a secondary instance had been
+     * started.
+     * @note Operating system can restrict the shared memory blocks to the same
+     * user, in which case the User/System modes will have no effect and the
+     * block will be user wide.
+     * @enum
+     */
+    enum Mode {
+        User                    = 1 << 0,
+        System                  = 1 << 1,
+        SecondaryNotification   = 1 << 2,
+        ExcludeAppVersion       = 1 << 3,
+        ExcludeAppPath          = 1 << 4
+    };
+    Q_DECLARE_FLAGS(Options, Mode)
+
+    /**
+     * @brief Intitializes a SingleApplication instance with argc command line
+     * arguments in argv
+     * @arg {int &} argc - Number of arguments in argv
+     * @arg {const char *[]} argv - Supplied command line arguments
+     * @arg {bool} allowSecondary - Whether to start the instance as secondary
+     * if there is already a primary instance.
+     * @arg {Mode} mode - Whether for the SingleApplication block to be applied
+     * User wide or System wide.
+     * @arg {int} timeout - Timeout to wait in milliseconds.
+     * @note argc and argv may be changed as Qt removes arguments that it
+     * recognizes
+     * @note Mode::SecondaryNotification only works if set on both the primary
+     * instance and the secondary instance.
+     * @note The timeout is just a hint for the maximum time of blocking
+     * operations. It does not guarantee that the SingleApplication
+     * initialisation will be completed in given time, though is a good hint.
+     * Usually 4*timeout would be the worst case (fail) scenario.
+     * @see See the corresponding QAPPLICATION_CLASS constructor for reference
+     */
+    explicit SingleApplication(int &argc, char *argv[], const char *appName = "SingleApplication", bool allowSecondary = false, Options options = Mode::User, int timeout = 1000 );
+    ~SingleApplication();
+
+    /**
+     * @brief Returns if the instance is the primary instance
+     * @returns {bool}
+     */
+    bool isPrimary();
+
+    /**
+     * @brief Returns if the instance is a secondary instance
+     * @returns {bool}
+     */
+    bool isSecondary();
+
+    /**
+     * @brief Returns a unique identifier for the current instance
+     * @returns {qint32}
+     */
+    quint32 instanceId();
+
+    /**
+     * @brief Returns the process ID (PID) of the primary instance
+     * @returns {qint64}
+     */
+    qint64 primaryPid();
+
+    /**
+     * @brief Sends a message to the primary instance. Returns true on success.
+     * @param {int} timeout - Timeout for connecting
+     * @returns {bool}
+     * @note sendMessage() will return false if invoked from the primary
+     * instance.
+     */
+    bool sendMessage( QByteArray message, int timeout = 100 );
+
+Q_SIGNALS:
+    void instanceStarted();
+    void receivedMessage( quint32 instanceId, QByteArray message );
+
+private:
+    SingleApplicationPrivate *d_ptr;
+    Q_DECLARE_PRIVATE(SingleApplication)
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(SingleApplication::Options)
+
+#endif // SINGLE_APPLICATION_H

3rd-parties/SingleApplication/singleapplication.pri

@@ -0,0 +1,19 @@
+QT += core network
+CONFIG += c++11
+
+HEADERS += $$PWD/singleapplication.h \
+    $$PWD/singleapplication_p.h
+SOURCES += $$PWD/singleapplication.cpp \
+    $$PWD/singleapplication_p.cpp
+
+INCLUDEPATH += $$PWD
+
+win32 {
+    msvc:LIBS += Advapi32.lib
+    gcc:LIBS += -ladvapi32
+}
+
+DISTFILES += \
+    $$PWD/README.md \
+    $$PWD/CHANGELOG.md \
+    $$PWD/Windows.md

3rd-parties/SingleApplication/singleapplication_p.cpp

@@ -0,0 +1,407 @@
+// The MIT License (MIT)
+//
+// Copyright (c) Itay Grudev 2015 - 2018
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+//
+//  W A R N I N G !!!
+//  -----------------
+//
+// This file is not part of the SingleApplication API. It is used purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or may even be removed.
+//
+
+#include <cstdlib>
+#include <cstddef>
+
+#include <QtCore/QDir>
+#include <QtCore/QByteArray>
+#include <QtCore/QDataStream>
+#include <QtCore/QCryptographicHash>
+#include <QtNetwork/QLocalServer>
+#include <QtNetwork/QLocalSocket>
+
+#include "singleapplication.h"
+#include "singleapplication_p.h"
+
+#ifdef Q_OS_UNIX
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#endif
+
+#ifdef Q_OS_WIN
+#include <windows.h>
+#include <lmcons.h>
+#endif
+
+SingleApplicationPrivate::SingleApplicationPrivate( SingleApplication *q_ptr )
+    : q_ptr( q_ptr )
+{
+    server = nullptr;
+    socket = nullptr;
+    memory = nullptr;
+    instanceNumber = -1;
+}
+
+SingleApplicationPrivate::~SingleApplicationPrivate()
+{
+    if( socket != nullptr ) {
+        socket->close();
+        delete socket;
+    }
+
+    memory->lock();
+    InstancesInfo* inst = static_cast<InstancesInfo*>(memory->data());
+    if( server != nullptr ) {
+        server->close();
+        delete server;
+        inst->primary = false;
+        inst->primaryPid = -1;
+        inst->checksum = blockChecksum();
+    }
+    memory->unlock();
+
+    delete memory;
+}
+
+void SingleApplicationPrivate::genBlockServerName(const char* appName)
+{
+    QCryptographicHash appData( QCryptographicHash::Sha256 );
+    appData.addData( appName, 17 );
+    appData.addData( SingleApplication::app_t::applicationName().toUtf8() );
+    appData.addData( SingleApplication::app_t::organizationName().toUtf8() );
+    appData.addData( SingleApplication::app_t::organizationDomain().toUtf8() );
+
+    if( ! (options & SingleApplication::Mode::ExcludeAppVersion) ) {
+        appData.addData( SingleApplication::app_t::applicationVersion().toUtf8() );
+    }
+
+    if( ! (options & SingleApplication::Mode::ExcludeAppPath) ) {
+#ifdef Q_OS_WIN
+        appData.addData( SingleApplication::app_t::applicationFilePath().toLower().toUtf8() );
+#else
+        appData.addData( SingleApplication::app_t::applicationFilePath().toUtf8() );
+#endif
+    }
+
+    // User level block requires a user specific data in the hash
+    if( options & SingleApplication::Mode::User ) {
+#ifdef Q_OS_WIN
+        wchar_t username [ UNLEN + 1 ];
+        // Specifies size of the buffer on input
+        DWORD usernameLength = UNLEN + 1;
+        if( GetUserNameW( username, &usernameLength ) ) {
+            appData.addData( QString::fromWCharArray(username).toUtf8() );
+        } else {
+            appData.addData( qgetenv("USERNAME") );
+        }
+#endif
+#ifdef Q_OS_UNIX
+        QByteArray username;
+        uid_t uid = geteuid();
+        struct passwd *pw = getpwuid(uid);
+        if( pw ) {
+            username = pw->pw_name;
+        }
+        if( username.isEmpty() ) {
+            username = qgetenv("USER");
+        }
+        appData.addData(username);
+#endif
+    }
+
+    appData.addData(qgetenv("DISPLAY"));
+
+    // Replace the backslash in RFC 2045 Base64 [a-zA-Z0-9+/=] to comply with
+    // server naming requirements.
+    blockServerName = appData.result().toBase64().replace("/", "_");
+}
+
+void SingleApplicationPrivate::initializeMemoryBlock()
+{
+    InstancesInfo* inst = static_cast<InstancesInfo*>( memory->data() );
+    inst->primary = false;
+    inst->secondary = 0;
+    inst->primaryPid = -1;
+    inst->checksum = blockChecksum();
+}
+
+void SingleApplicationPrivate::startPrimary()
+{
+    Q_Q(SingleApplication);
+
+    // Successful creation means that no main process exists
+    // So we start a QLocalServer to listen for connections
+    QLocalServer::removeServer( blockServerName );
+    server = new QLocalServer();
+
+    // Restrict access to the socket according to the
+    // SingleApplication::Mode::User flag on User level or no restrictions
+    if( options & SingleApplication::Mode::User ) {
+        server->setSocketOptions( QLocalServer::UserAccessOption );
+    } else {
+        server->setSocketOptions( QLocalServer::WorldAccessOption );
+    }
+
+    server->listen( blockServerName );
+    QObject::connect(
+        server,
+        &QLocalServer::newConnection,
+        this,
+        &SingleApplicationPrivate::slotConnectionEstablished
+    );
+
+    // Reset the number of connections
+    InstancesInfo* inst = static_cast <InstancesInfo*>( memory->data() );
+
+    inst->primary = true;
+    inst->primaryPid = q->applicationPid();
+    inst->checksum = blockChecksum();
+
+    instanceNumber = 0;
+}
+
+void SingleApplicationPrivate::startSecondary()
+{
+}
+
+void SingleApplicationPrivate::connectToPrimary( int msecs, ConnectionType connectionType )
+{
+    // Connect to the Local Server of the Primary Instance if not already
+    // connected.
+    if( socket == nullptr ) {
+        socket = new QLocalSocket();
+    }
+
+    // If already connected - we are done;
+    if( socket->state() == QLocalSocket::ConnectedState )
+        return;
+
+    // If not connect
+    if( socket->state() == QLocalSocket::UnconnectedState ||
+            socket->state() == QLocalSocket::ClosingState ) {
+        socket->connectToServer( blockServerName );
+    }
+
+    // Wait for being connected
+    if( socket->state() == QLocalSocket::ConnectingState ) {
+        socket->waitForConnected( msecs );
+    }
+
+    // Initialisation message according to the SingleApplication protocol
+    if( socket->state() == QLocalSocket::ConnectedState ) {
+        // Notify the parent that a new instance had been started;
+        QByteArray initMsg;
+        QDataStream writeStream(&initMsg, QIODevice::WriteOnly);
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+        writeStream.setVersion(QDataStream::Qt_5_6);
+#endif
+
+        writeStream << blockServerName.toLatin1();
+        writeStream << static_cast<quint8>(connectionType);
+        writeStream << instanceNumber;
+        quint16 checksum = qChecksum(initMsg.constData(), static_cast<quint32>(initMsg.length()));
+        writeStream << checksum;
+
+        // The header indicates the message length that follows
+        QByteArray header;
+        QDataStream headerStream(&header, QIODevice::WriteOnly);
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+        headerStream.setVersion(QDataStream::Qt_5_6);
+#endif
+        headerStream << static_cast <quint64>( initMsg.length() );
+
+        socket->write( header );
+        socket->write( initMsg );
+        socket->flush();
+        socket->waitForBytesWritten( msecs );
+    }
+}
+
+quint16 SingleApplicationPrivate::blockChecksum()
+{
+    return qChecksum(
+               static_cast <const char *>( memory->data() ),
+               offsetof( InstancesInfo, checksum )
+           );
+}
+
+qint64 SingleApplicationPrivate::primaryPid()
+{
+    qint64 pid;
+
+    memory->lock();
+    InstancesInfo* inst = static_cast<InstancesInfo*>( memory->data() );
+    pid = inst->primaryPid;
+    memory->unlock();
+
+    return pid;
+}
+
+/**
+ * @brief Executed when a connection has been made to the LocalServer
+ */
+void SingleApplicationPrivate::slotConnectionEstablished()
+{
+    QLocalSocket *nextConnSocket = server->nextPendingConnection();
+    connectionMap.insert(nextConnSocket, ConnectionInfo());
+
+    QObject::connect(nextConnSocket, &QLocalSocket::aboutToClose,
+    [nextConnSocket, this]() {
+        auto &info = connectionMap[nextConnSocket];
+        Q_EMIT this->slotClientConnectionClosed( nextConnSocket, info.instanceId );
+    }
+                    );
+
+    QObject::connect(nextConnSocket, &QLocalSocket::disconnected,
+    [nextConnSocket, this]() {
+        connectionMap.remove(nextConnSocket);
+        nextConnSocket->deleteLater();
+    }
+                    );
+
+    QObject::connect(nextConnSocket, &QLocalSocket::readyRead,
+    [nextConnSocket, this]() {
+        auto &info = connectionMap[nextConnSocket];
+        switch(info.stage) {
+        case StageHeader:
+            readInitMessageHeader(nextConnSocket);
+            break;
+        case StageBody:
+            readInitMessageBody(nextConnSocket);
+            break;
+        case StageConnected:
+            Q_EMIT this->slotDataAvailable( nextConnSocket, info.instanceId );
+            break;
+        default:
+            break;
+        };
+    }
+                    );
+}
+
+void SingleApplicationPrivate::readInitMessageHeader( QLocalSocket *sock )
+{
+    if (!connectionMap.contains( sock )) {
+        return;
+    }
+
+    if( sock->bytesAvailable() < ( qint64 )sizeof( quint64 ) ) {
+        return;
+    }
+
+    QDataStream headerStream( sock );
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+    headerStream.setVersion( QDataStream::Qt_5_6 );
+#endif
+
+    // Read the header to know the message length
+    quint64 msgLen = 0;
+    headerStream >> msgLen;
+    ConnectionInfo &info = connectionMap[sock];
+    info.stage = StageBody;
+    info.msgLen = msgLen;
+
+    if ( sock->bytesAvailable() >= (qint64) msgLen ) {
+        readInitMessageBody( sock );
+    }
+}
+
+void SingleApplicationPrivate::readInitMessageBody( QLocalSocket *sock )
+{
+    Q_Q(SingleApplication);
+
+    if (!connectionMap.contains( sock )) {
+        return;
+    }
+
+    ConnectionInfo &info = connectionMap[sock];
+    if( sock->bytesAvailable() < ( qint64 )info.msgLen ) {
+        return;
+    }
+
+    // Read the message body
+    QByteArray msgBytes = sock->read(info.msgLen);
+    QDataStream readStream(msgBytes);
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+    readStream.setVersion( QDataStream::Qt_5_6 );
+#endif
+
+    // server name
+    QByteArray latin1Name;
+    readStream >> latin1Name;
+
+    // connection type
+    ConnectionType connectionType = InvalidConnection;
+    quint8 connTypeVal = InvalidConnection;
+    readStream >> connTypeVal;
+    connectionType = static_cast <ConnectionType>( connTypeVal );
+
+    // instance id
+    quint32 instanceId = 0;
+    readStream >> instanceId;
+
+    // checksum
+    quint16 msgChecksum = 0;
+    readStream >> msgChecksum;
+
+    const quint16 actualChecksum = qChecksum( msgBytes.constData(), static_cast<quint32>( msgBytes.length() - sizeof( quint16 ) ) );
+
+    bool isValid = readStream.status() == QDataStream::Ok &&
+                   QLatin1String(latin1Name) == blockServerName &&
+                   msgChecksum == actualChecksum;
+
+    if( !isValid ) {
+        sock->close();
+        return;
+    }
+
+    info.instanceId = instanceId;
+    info.stage = StageConnected;
+
+    if( connectionType == NewInstance ||
+            ( connectionType == SecondaryInstance &&
+              options & SingleApplication::Mode::SecondaryNotification ) )
+    {
+        Q_EMIT q->instanceStarted();
+    }
+
+    if (sock->bytesAvailable() > 0) {
+        Q_EMIT this->slotDataAvailable( sock, instanceId );
+    }
+}
+
+void SingleApplicationPrivate::slotDataAvailable( QLocalSocket *dataSocket, quint32 instanceId )
+{
+    Q_Q(SingleApplication);
+    Q_EMIT q->receivedMessage( instanceId, dataSocket->readAll() );
+}
+
+void SingleApplicationPrivate::slotClientConnectionClosed( QLocalSocket *closedSocket, quint32 instanceId )
+{
+    if( closedSocket->bytesAvailable() > 0 )
+        Q_EMIT slotDataAvailable( closedSocket, instanceId  );
+}

3rd-parties/SingleApplication/singleapplication_p.h

@@ -0,0 +1,99 @@
+// The MIT License (MIT)
+//
+// Copyright (c) Itay Grudev 2015 - 2016
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+//
+//  W A R N I N G !!!
+//  -----------------
+//
+// This file is not part of the SingleApplication API. It is used purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or may even be removed.
+//
+
+#ifndef SINGLEAPPLICATION_P_H
+#define SINGLEAPPLICATION_P_H
+
+#include <QtCore/QSharedMemory>
+#include <QtNetwork/QLocalServer>
+#include <QtNetwork/QLocalSocket>
+#include "singleapplication.h"
+
+struct InstancesInfo {
+    bool primary;
+    quint32 secondary;
+    qint64 primaryPid;
+    quint16 checksum;
+};
+
+struct ConnectionInfo {
+    explicit ConnectionInfo() :
+        msgLen(0), instanceId(0), stage(0) {}
+    qint64 msgLen;
+    quint32 instanceId;
+    quint8 stage;
+};
+
+class SingleApplicationPrivate : public QObject {
+    Q_OBJECT
+public:
+    enum ConnectionType : quint8 {
+        InvalidConnection = 0,
+        NewInstance = 1,
+        SecondaryInstance = 2,
+        Reconnect = 3
+    };
+    enum ConnectionStage : quint8 {
+        StageHeader = 0,
+        StageBody = 1,
+        StageConnected = 2,
+    };
+    Q_DECLARE_PUBLIC(SingleApplication)
+
+    SingleApplicationPrivate( SingleApplication *q_ptr );
+    ~SingleApplicationPrivate();
+
+    void genBlockServerName(const char *appName);
+    void initializeMemoryBlock();
+    void startPrimary();
+    void startSecondary();
+    void connectToPrimary(int msecs, ConnectionType connectionType );
+    quint16 blockChecksum();
+    qint64 primaryPid();
+    void readInitMessageHeader(QLocalSocket *socket);
+    void readInitMessageBody(QLocalSocket *socket);
+
+    SingleApplication *q_ptr;
+    QSharedMemory *memory;
+    QLocalSocket *socket;
+    QLocalServer *server;
+    quint32 instanceNumber;
+    QString blockServerName;
+    SingleApplication::Options options;
+    QMap<QLocalSocket*, ConnectionInfo> connectionMap;
+
+public Q_SLOTS:
+    void slotConnectionEstablished();
+    void slotDataAvailable( QLocalSocket*, quint32 );
+    void slotClientConnectionClosed( QLocalSocket*, quint32 );
+};
+
+#endif // SINGLEAPPLICATION_P_H

3rd-parties/qtsingleapplication/QtLockedFile

@@ -0,0 +1 @@
+#include "qtlockedfile.h"

3rd-parties/qtsingleapplication/QtSingleApplication

@@ -0,0 +1 @@
+#include "qtsingleapplication.h"

3rd-parties/qtsingleapplication/qtlocalpeer.cpp

@@ -0,0 +1,216 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qtlocalpeer.h"
+#include <QCoreApplication>
+#include <QDataStream>
+#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 <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+#endif
+
+namespace QtLP_Private {
+#include "qtlockedfile.cpp"
+#if defined(Q_OS_WIN)
+#include "qtlockedfile_win.cpp"
+#else
+#include "qtlockedfile_unix.cpp"
+#endif
+}
+
+const char* QtLocalPeer::ack = "ack";
+
+QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
+    : QObject(parent), id(appId)
+{
+    QString prefix = id;
+    if (id.isEmpty()) {
+        id = QCoreApplication::applicationFilePath();
+#if defined(Q_OS_WIN)
+        id = id.toLower();
+#endif
+        prefix = id.section(QLatin1Char('/'), -1);
+    }
+    prefix.remove(QRegExp("[^a-zA-Z]"));
+    prefix.truncate(6);
+
+    QByteArray idc = id.toUtf8();
+    quint16 idNum = qChecksum(idc.constData(), idc.size());
+    socketName = QLatin1String("qtsingleapp-") + prefix
+                 + QLatin1Char('-') + 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(QtLP_Private::QtLockedFile::WriteLock, false))
+        return true;
+
+    bool res = server->listen(socketName);
+#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
+    // ### Workaround
+    if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
+        QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
+        res = server->listen(socketName);
+    }
+#endif
+    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);
+    if (res) {
+        res &= socket.waitForReadyRead(timeout);   // wait for ack
+        if (res)
+            res &= (socket.read(qstrlen(ack)) == ack);
+    }
+    return res;
+}
+
+
+void QtLocalPeer::receiveConnection()
+{
+    QLocalSocket* socket = server->nextPendingConnection();
+    if (!socket)
+        return;
+
+    while (true) {
+        if (socket->state() == QLocalSocket::UnconnectedState) {
+            qWarning("QtLocalPeer: Peer disconnected");
+            delete socket;
+            socket = nullptr;
+            return;
+        }
+        if (socket->bytesAvailable() >= qint64(sizeof(quint32)))
+            break;
+        socket->waitForReadyRead();
+    }
+
+    QDataStream ds(socket);
+    QByteArray uMsg;
+    quint32 remaining;
+    ds >> remaining;
+    uMsg.resize(remaining);
+    int got = 0;
+    char* uMsgBuf = uMsg.data();
+    do {
+        got = ds.readRawData(uMsgBuf, remaining);
+        remaining -= got;
+        uMsgBuf += got;
+    } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
+    if (got < 0) {
+        qWarning("QtLocalPeer: Message reception failed %s", socket->errorString().toLatin1().constData());
+        delete socket;
+        socket = nullptr;
+        return;
+    }
+    QString message(QString::fromUtf8(uMsg));
+    socket->write(ack, qstrlen(ack));
+    socket->waitForBytesWritten(1000);
+    socket->waitForDisconnected(1000); // make sure client reads ack
+    delete socket;
+    socket = nullptr;
+    Q_EMIT messageReceived(message); //### (might take a long time to return)
+}

3rd-parties/qtsingleapplication/qtlocalpeer.h

@@ -0,0 +1,77 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTLOCALPEER_H
+#define QTLOCALPEER_H
+
+#include <QLocalServer>
+#include <QLocalSocket>
+#include <QDir>
+
+#include "qtlockedfile.h"
+
+class QtLocalPeer : public QObject
+{
+    Q_OBJECT
+
+public:
+    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;
+    QtLP_Private::QtLockedFile lockFile;
+
+private:
+    static const char* ack;
+};
+
+#endif // QTLOCALPEER_H

3rd-parties/qtsingleapplication/qtlockedfile.cpp

@@ -0,0 +1,193 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtlockedfile.h"
+
+/*!
+    \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
+    QLockedFile. 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
+    wmutex = 0;
+    rmutex = 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
+    wmutex = 0;
+    rmutex = 0;
+#endif
+    m_lock_mode = NoLock;
+}
+
+/*!
+  Opens the file in OpenMode \a mode.
+
+  This is identical to QFile::open(), with the one exception that the
+  Truncate mode flag is disallowed. Truncation would conflict with the
+  advisory file locking, since the file would be modified before the
+  write lock is obtained. If truncation is required, use resize(0)
+  after obtaining the write lock.
+
+  Returns true if successful; otherwise false.
+
+  \sa QFile::open(), QFile::resize()
+*/
+bool QtLockedFile::open(OpenMode mode)
+{
+    if (mode & QIODevice::Truncate) {
+        qWarning("QtLockedFile::open(): Truncate mode not allowed.");
+        return false;
+    }
+    return QFile::open(mode);
+}
+
+/*!
+    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. The file must be opened before it
+    can be locked.
+
+    If \a block is true, this function will block until the lock is
+    aquired. If \a block is false, this function returns \e false
+    immediately if the lock cannot be aquired.
+
+    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.
+*/

3rd-parties/qtsingleapplication/qtlockedfile.h

@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTLOCKEDFILE_H
+#define QTLOCKEDFILE_H
+
+#include <QFile>
+#ifdef Q_OS_WIN
+#include <QVector>
+#endif
+
+#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 QtLP_Private {
+
+class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
+{
+public:
+    enum LockMode { NoLock = 0, ReadLock, WriteLock };
+
+    QtLockedFile();
+    QtLockedFile(const QString &name);
+    ~QtLockedFile();
+
+    bool open(OpenMode mode);
+
+    bool lock(LockMode mode, bool block = true);
+    bool unlock();
+    bool isLocked() const;
+    LockMode lockMode() const;
+
+private:
+#ifdef Q_OS_WIN
+    Qt::HANDLE wmutex;
+    Qt::HANDLE rmutex;
+    QVector<Qt::HANDLE> rmutexes;
+    QString mutexname;
+
+    Qt::HANDLE getMutexHandle(int idx, bool doCreate);
+    bool waitMutex(Qt::HANDLE mutex, bool doBlock);
+
+#endif
+    LockMode m_lock_mode;
+};
+}
+#endif

3rd-parties/qtsingleapplication/qtlockedfile_unix.cpp

@@ -0,0 +1,115 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "qtlockedfile.h"
+
+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();
+}
+

3rd-parties/qtsingleapplication/qtlockedfile_win.cpp

@@ -0,0 +1,211 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtlockedfile.h"
+#include <qt_windows.h>
+#include <QFileInfo>
+
+#define MUTEX_PREFIX "QtLockedFile mutex "
+// Maximum number of concurrent read locks. Must not be greater than MAXIMUM_WAIT_OBJECTS
+#define MAX_READERS MAXIMUM_WAIT_OBJECTS
+
+#if QT_VERSION >= 0x050000
+#define QT_WA(unicode, ansi) unicode
+#endif
+
+Qt::HANDLE QtLockedFile::getMutexHandle(int idx, bool doCreate)
+{
+    if (mutexname.isEmpty()) {
+        QFileInfo fi(*this);
+        mutexname = QString::fromLatin1(MUTEX_PREFIX)
+                    + fi.absoluteFilePath().toLower();
+    }
+    QString mname(mutexname);
+    if (idx >= 0)
+        mname += QString::number(idx);
+
+    Qt::HANDLE mutex;
+    if (doCreate) {
+        QT_WA( { mutex = CreateMutexW(NULL, FALSE, (TCHAR*)mname.utf16()); },
+               { mutex = CreateMutexA(NULL, FALSE, mname.toLocal8Bit().constData()); } );
+        if (!mutex) {
+            qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
+            return 0;
+        }
+    }
+    else {
+        QT_WA( { mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (TCHAR*)mname.utf16()); },
+               { mutex = OpenMutexA(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, mname.toLocal8Bit().constData()); } );
+        if (!mutex) {
+            if (GetLastError() != ERROR_FILE_NOT_FOUND)
+                qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
+            return 0;
+        }
+    }
+    return mutex;
+}
+
+bool QtLockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock)
+{
+    Q_ASSERT(mutex);
+    DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
+    switch (res) {
+    case WAIT_OBJECT_0:
+    case WAIT_ABANDONED:
+        return true;
+        break;
+    case WAIT_TIMEOUT:
+        break;
+    default:
+        qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
+    }
+    return false;
+}
+
+
+
+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();
+
+    if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
+        return false;
+
+    if (!waitMutex(wmutex, block))
+        return false;
+
+    if (mode == ReadLock) {
+        int idx = 0;
+        for (; idx < MAX_READERS; idx++) {
+            rmutex = getMutexHandle(idx, false);
+            if (!rmutex || waitMutex(rmutex, false))
+                break;
+            CloseHandle(rmutex);
+        }
+        bool ok = true;
+        if (idx >= MAX_READERS) {
+            qWarning("QtLockedFile::lock(): too many readers");
+            rmutex = 0;
+            ok = false;
+        }
+        else if (!rmutex) {
+            rmutex = getMutexHandle(idx, true);
+            if (!rmutex || !waitMutex(rmutex, false))
+                ok = false;
+        }
+        if (!ok && rmutex) {
+            CloseHandle(rmutex);
+            rmutex = 0;
+        }
+        ReleaseMutex(wmutex);
+        if (!ok)
+            return false;
+    }
+    else {
+        Q_ASSERT(rmutexes.isEmpty());
+        for (int i = 0; i < MAX_READERS; i++) {
+            Qt::HANDLE mutex = getMutexHandle(i, false);
+            if (mutex)
+                rmutexes.append(mutex);
+        }
+        if (rmutexes.size()) {
+            DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
+                                               TRUE, block ? INFINITE : 0);
+            if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
+                if (res != WAIT_TIMEOUT)
+                    qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
+                m_lock_mode = WriteLock;  // trick unlock() to clean up - semiyucky
+                unlock();
+                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;
+
+    if (m_lock_mode == ReadLock) {
+        ReleaseMutex(rmutex);
+        CloseHandle(rmutex);
+        rmutex = 0;
+    }
+    else {
+        foreach(Qt::HANDLE mutex, rmutexes) {
+            ReleaseMutex(mutex);
+            CloseHandle(mutex);
+        }
+        rmutexes.clear();
+        ReleaseMutex(wmutex);
+    }
+
+    m_lock_mode = QtLockedFile::NoLock;
+    return true;
+}
+
+QtLockedFile::~QtLockedFile()
+{
+    if (isOpen())
+        unlock();
+    if (wmutex)
+        CloseHandle(wmutex);
+}

3rd-parties/qtsingleapplication/qtsingleapplication.cpp

@@ -0,0 +1,347 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qtsingleapplication.h"
+#include "qtlocalpeer.h"
+#include <QWidget>
+
+
+/*!
+    \class QtSingleApplication qtsingleapplication.h
+    \brief The QtSingleApplication class provides an API to detect and
+    communicate with running instances of an application.
+
+    This class allows you to create applications where only one
+    instance should be running at a time. I.e., if the user tries to
+    launch another instance, the already running instance will be
+    activated instead. Another usecase is a client-server system,
+    where the first started instance will assume the role of server,
+    and the later instances will act as clients of that server.
+
+    By default, the full path of the executable file is used to
+    determine whether two processes are instances of the same
+    application. You can also provide an explicit identifier string
+    that will be compared instead.
+
+    The application should create the QtSingleApplication object early
+    in the startup phase, and call isRunning() to find out if another
+    instance of this application is already running. If isRunning()
+    returns false, it means that no other instance is running, and
+    this instance has assumed the role as the running instance. In
+    this case, the application should continue with the initialization
+    of the application user interface before entering the event loop
+    with exec(), as normal.
+
+    The messageReceived() signal will be emitted when the running
+    application receives messages from another instance of the same
+    application. When a message is received it might be helpful to the
+    user to raise the application so that it becomes visible. To
+    facilitate this, QtSingleApplication provides the
+    setActivationWindow() function and the activateWindow() slot.
+
+    If isRunning() returns true, another instance is already
+    running. It may be alerted to the fact that another instance has
+    started by using the sendMessage() function. Also data such as
+    startup parameters (e.g. the name of the file the user wanted this
+    new instance to open) can be passed to the running instance with
+    this function. Then, the application should terminate (or enter
+    client mode).
+
+    If isRunning() returns true, but sendMessage() fails, that is an
+    indication that the running instance is frozen.
+
+    Here's an example that shows how to convert an existing
+    application to use QtSingleApplication. It is very simple and does
+    not make use of all QtSingleApplication's functionality (see the
+    examples for that).
+
+    \code
+    // Original
+    int main(int argc, char **argv)
+    {
+        QApplication app(argc, argv);
+
+        MyMainWidget mmw;
+        mmw.show();
+        return app.exec();
+    }
+
+    // Single instance
+    int main(int argc, char **argv)
+    {
+        QtSingleApplication app(argc, argv);
+
+        if (app.isRunning())
+            return !app.sendMessage(someDataString);
+
+        MyMainWidget mmw;
+        app.setActivationWindow(&mmw);
+        mmw.show();
+        return app.exec();
+    }
+    \endcode
+
+    Once this QtSingleApplication instance is destroyed (normally when
+    the process exits or crashes), when the user next attempts to run the
+    application this instance will not, of course, be encountered. The
+    next instance to call isRunning() or sendMessage() will assume the
+    role as the new running instance.
+
+    For console (non-GUI) applications, QtSingleCoreApplication may be
+    used instead of this class, to avoid the dependency on the QtGui
+    library.
+
+    \sa QtSingleCoreApplication
+*/
+
+
+void QtSingleApplication::sysInit(const QString &appId)
+{
+    actWin = 0;
+    peer = new QtLocalPeer(this, appId);
+    connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
+}
+
+
+/*!
+    Creates a QtSingleApplication object. The application identifier
+    will be QCoreApplication::applicationFilePath(). \a argc, \a
+    argv, and \a GUIenabled are passed on to the QAppliation constructor.
+
+    If you are creating a console application (i.e. setting \a
+    GUIenabled to false), you may consider using
+    QtSingleCoreApplication instead.
+*/
+
+QtSingleApplication::QtSingleApplication(int &argc, char **argv, bool GUIenabled)
+    : QApplication(argc, argv, GUIenabled)
+{
+    sysInit();
+}
+
+
+/*!
+    Creates a QtSingleApplication object with the application
+    identifier \a appId. \a argc and \a argv are passed on to the
+    QAppliation constructor.
+*/
+
+QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char **argv)
+    : QApplication(argc, argv)
+{
+    sysInit(appId);
+}
+
+#if QT_VERSION < 0x050000
+
+/*!
+    Creates a QtSingleApplication object. The application identifier
+    will be QCoreApplication::applicationFilePath(). \a argc, \a
+    argv, and \a type are passed on to the QAppliation constructor.
+*/
+QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
+    : QApplication(argc, argv, type)
+{
+    sysInit();
+}
+
+
+#  if defined(Q_WS_X11)
+/*!
+  Special constructor for X11, ref. the documentation of
+  QApplication's corresponding constructor. The application identifier
+  will be QCoreApplication::applicationFilePath(). \a dpy, \a visual,
+  and \a cmap are passed on to the QApplication constructor.
+*/
+QtSingleApplication::QtSingleApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE cmap)
+    : QApplication(dpy, visual, cmap)
+{
+    sysInit();
+}
+
+/*!
+  Special constructor for X11, ref. the documentation of
+  QApplication's corresponding constructor. The application identifier
+  will be QCoreApplication::applicationFilePath(). \a dpy, \a argc, \a
+  argv, \a visual, and \a cmap are passed on to the QApplication
+  constructor.
+*/
+QtSingleApplication::QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
+    : QApplication(dpy, argc, argv, visual, cmap)
+{
+    sysInit();
+}
+
+/*!
+  Special constructor for X11, ref. the documentation of
+  QApplication's corresponding constructor. The application identifier
+  will be \a appId. \a dpy, \a argc, \a
+  argv, \a visual, and \a cmap are passed on to the QApplication
+  constructor.
+*/
+QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
+    : QApplication(dpy, argc, argv, visual, cmap)
+{
+    sysInit(appId);
+}
+#  endif // Q_WS_X11
+#endif // QT_VERSION < 0x050000
+
+
+/*!
+    Returns true if another instance of this application is running;
+    otherwise false.
+
+    This function does not find instances of this application that are
+    being run by a different user (on Windows: that are running in
+    another session).
+
+    \sa sendMessage()
+*/
+
+bool QtSingleApplication::isRunning()
+{
+    return peer->isClient();
+}
+
+
+/*!
+    Tries to send the text \a message to the currently running
+    instance. The QtSingleApplication object in the running instance
+    will emit the messageReceived() signal when it receives the
+    message.
+
+    This function returns true if the message has been sent to, and
+    processed by, the current instance. If there is no instance
+    currently running, or if the running instance fails to process the
+    message within \a timeout milliseconds, this function return false.
+
+    \sa isRunning(), messageReceived()
+*/
+bool QtSingleApplication::sendMessage(const QString &message, int timeout)
+{
+    return peer->sendMessage(message, timeout);
+}
+
+
+/*!
+    Returns the application identifier. Two processes with the same
+    identifier will be regarded as instances of the same application.
+*/
+QString QtSingleApplication::id() const
+{
+    return peer->applicationId();
+}
+
+
+/*!
+  Sets the activation window of this application to \a aw. The
+  activation window is the widget that will be activated by
+  activateWindow(). This is typically the application's main window.
+
+  If \a activateOnMessage is true (the default), the window will be
+  activated automatically every time a message is received, just prior
+  to the messageReceived() signal being emitted.
+
+  \sa activateWindow(), messageReceived()
+*/
+
+void QtSingleApplication::setActivationWindow(QWidget* aw, bool activateOnMessage)
+{
+    actWin = aw;
+    if (activateOnMessage)
+        connect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
+    else
+        disconnect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
+}
+
+
+/*!
+    Returns the applications activation window if one has been set by
+    calling setActivationWindow(), otherwise returns 0.
+
+    \sa setActivationWindow()
+*/
+QWidget* QtSingleApplication::activationWindow() const
+{
+    return actWin;
+}
+
+
+/*!
+  De-minimizes, raises, and activates this application's activation window.
+  This function does nothing if no activation window has been set.
+
+  This is a convenience function to show the user that this
+  application instance has been activated when he has tried to start
+  another instance.
+
+  This function should typically be called in response to the
+  messageReceived() signal. By default, that will happen
+  automatically, if an activation window has been set.
+
+  \sa setActivationWindow(), messageReceived(), initialize()
+*/
+void QtSingleApplication::activateWindow()
+{
+    if (actWin) {
+        //actWin->setWindowState(actWin->windowState() & ~Qt::WindowMinimized);
+        actWin->raise();
+        actWin->activateWindow();
+    }
+}
+
+
+/*!
+    \fn void QtSingleApplication::messageReceived(const QString& message)
+
+    This signal is emitted when the current instance receives a \a
+    message from another instance of this application.
+
+    \sa sendMessage(), setActivationWindow(), activateWindow()
+*/
+
+
+/*!
+    \fn void QtSingleApplication::initialize(bool dummy = true)
+
+    \obsolete
+*/

3rd-parties/qtsingleapplication/qtsingleapplication.h

@@ -0,0 +1,105 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTSINGLEAPPLICATION_H
+#define QTSINGLEAPPLICATION_H
+
+#include <QApplication>
+
+class QtLocalPeer;
+
+#if defined(Q_OS_WIN)
+#  if !defined(QT_QTSINGLEAPPLICATION_EXPORT) && !defined(QT_QTSINGLEAPPLICATION_IMPORT)
+#    define QT_QTSINGLEAPPLICATION_EXPORT
+#  elif defined(QT_QTSINGLEAPPLICATION_IMPORT)
+#    if defined(QT_QTSINGLEAPPLICATION_EXPORT)
+#      undef QT_QTSINGLEAPPLICATION_EXPORT
+#    endif
+#    define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllimport)
+#  elif defined(QT_QTSINGLEAPPLICATION_EXPORT)
+#    undef QT_QTSINGLEAPPLICATION_EXPORT
+#    define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllexport)
+#  endif
+#else
+#  define QT_QTSINGLEAPPLICATION_EXPORT
+#endif
+
+class QT_QTSINGLEAPPLICATION_EXPORT QtSingleApplication : public QApplication
+{
+    Q_OBJECT
+
+public:
+    QtSingleApplication(int &argc, char **argv, bool GUIenabled = true);
+    QtSingleApplication(const QString &id, int &argc, char **argv);
+#if QT_VERSION < 0x050000
+    QtSingleApplication(int &argc, char **argv, Type type);
+#  if defined(Q_WS_X11)
+    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);
+    QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
+#  endif // Q_WS_X11
+#endif // QT_VERSION < 0x050000
+
+    bool isRunning();
+    QString id() const;
+
+    void setActivationWindow(QWidget* aw, bool activateOnMessage = true);
+    QWidget* activationWindow() const;
+
+    // Obsolete:
+    void initialize(bool dummy = true)
+        { isRunning(); Q_UNUSED(dummy) }
+
+public Q_SLOTS:
+    bool sendMessage(const QString &message, int timeout = 5000);
+    void activateWindow();
+
+
+Q_SIGNALS:
+    void messageReceived(const QString &message);
+
+
+private:
+    void sysInit(const QString &appId = QString());
+    QtLocalPeer *peer;
+    QWidget *actWin;
+};
+
+#endif // QTSINGLEAPPLICATION_H

3rd-parties/qtsingleapplication/qtsingleapplication.pri

@@ -0,0 +1,16 @@
+INCLUDEPATH += $$PWD
+DEPENDPATH += $$PWD
+QT *= network
+greaterThan(QT_MAJOR_VERSION, 4): QT *= widgets
+
+qtsingleapplication-uselib:!qtsingleapplication-buildlib {
+    LIBS += -L$$QTSINGLEAPPLICATION_LIBDIR -l$$QTSINGLEAPPLICATION_LIBNAME
+} else {
+    SOURCES += $$PWD/qtsingleapplication.cpp $$PWD/qtlocalpeer.cpp
+    HEADERS += $$PWD/qtsingleapplication.h $$PWD/qtlocalpeer.h
+}
+
+win32 {
+    contains(TEMPLATE, lib):contains(CONFIG, shared):DEFINES += QT_QTSINGLEAPPLICATION_EXPORT
+    else:qtsingleapplication-uselib:DEFINES += QT_QTSINGLEAPPLICATION_IMPORT
+}

3rd-parties/qtsingleapplication/qtsinglecoreapplication.cpp

@@ -0,0 +1,149 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qtsinglecoreapplication.h"
+#include "qtlocalpeer.h"
+
+/*!
+    \class QtSingleCoreApplication qtsinglecoreapplication.h
+    \brief A variant of the QtSingleApplication class for non-GUI applications.
+
+    This class is a variant of QtSingleApplication suited for use in
+    console (non-GUI) applications. It is an extension of
+    QCoreApplication (instead of QApplication). It does not require
+    the QtGui library.
+
+    The API and usage is identical to QtSingleApplication, except that
+    functions relating to the "activation window" are not present, for
+    obvious reasons. Please refer to the QtSingleApplication
+    documentation for explanation of the usage.
+
+    A QtSingleCoreApplication instance can communicate to a
+    QtSingleApplication instance if they share the same application
+    id. Hence, this class can be used to create a light-weight
+    command-line tool that sends commands to a GUI application.
+
+    \sa QtSingleApplication
+*/
+
+/*!
+    Creates a QtSingleCoreApplication object. The application identifier
+    will be QCoreApplication::applicationFilePath(). \a argc and \a
+    argv are passed on to the QCoreAppliation constructor.
+*/
+
+QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv)
+    : QCoreApplication(argc, argv)
+{
+    peer = new QtLocalPeer(this);
+    connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
+}
+
+
+/*!
+    Creates a QtSingleCoreApplication object with the application
+    identifier \a appId. \a argc and \a argv are passed on to the
+    QCoreAppliation constructor.
+*/
+QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv)
+    : QCoreApplication(argc, argv)
+{
+    peer = new QtLocalPeer(this, appId);
+    connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
+}
+
+
+/*!
+    Returns true if another instance of this application is running;
+    otherwise false.
+
+    This function does not find instances of this application that are
+    being run by a different user (on Windows: that are running in
+    another session).
+
+    \sa sendMessage()
+*/
+
+bool QtSingleCoreApplication::isRunning()
+{
+    return peer->isClient();
+}
+
+
+/*!
+    Tries to send the text \a message to the currently running
+    instance. The QtSingleCoreApplication object in the running instance
+    will emit the messageReceived() signal when it receives the
+    message.
+
+    This function returns true if the message has been sent to, and
+    processed by, the current instance. If there is no instance
+    currently running, or if the running instance fails to process the
+    message within \a timeout milliseconds, this function return false.
+
+    \sa isRunning(), messageReceived()
+*/
+
+bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout)
+{
+    return peer->sendMessage(message, timeout);
+}
+
+
+/*!
+    Returns the application identifier. Two processes with the same
+    identifier will be regarded as instances of the same application.
+*/
+
+QString QtSingleCoreApplication::id() const
+{
+    return peer->applicationId();
+}
+
+
+/*!
+    \fn void QtSingleCoreApplication::messageReceived(const QString& message)
+
+    This signal is emitted when the current instance receives a \a
+    message from another instance of this application.
+
+    \sa sendMessage()
+*/

3rd-parties/qtsingleapplication/qtsinglecoreapplication.h

@@ -0,0 +1,71 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Solutions component.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTSINGLECOREAPPLICATION_H
+#define QTSINGLECOREAPPLICATION_H
+
+#include <QCoreApplication>
+
+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;
+};
+
+#endif // QTSINGLECOREAPPLICATION_H

3rd-parties/qtsingleapplication/qtsinglecoreapplication.pri

@@ -0,0 +1,10 @@
+INCLUDEPATH	+= $$PWD
+DEPENDPATH      += $$PWD
+HEADERS		+= $$PWD/qtsinglecoreapplication.h $$PWD/qtlocalpeer.h
+SOURCES		+= $$PWD/qtsinglecoreapplication.cpp $$PWD/qtlocalpeer.cpp
+
+QT *= network
+
+win32:contains(TEMPLATE, lib):contains(CONFIG, shared) {
+    DEFINES += QT_QTSINGLECOREAPPLICATION_EXPORT=__declspec(dllexport)
+}

data/ukui-search-service.desktop

@@ -0,0 +1,16 @@
+[Desktop Entry]
+Name=ukui-search-service
+Name[zh_CN]=搜索服务
+GenericName=ukui-search-service
+GenericName[zh_CN]=搜索服务
+Comment=ukui-search-service
+Comment[zh_CN]=搜索服务
+Exec=/usr/bin/ukui-search-service %U
+Type=Application
+Icon=kylin-search
+X-UKUI-AutoRestart=true
+OnlyShowIn=UKUI
+NoDisplay=true
+X-UKUI-Autostart-Phase=Application
+Terminal=false
+

debian/ukui-search.install

@@ -1,4 +1,5 @@
 usr/bin/ukui-search
+usr/bin/ukui-search-service
 etc/xdg/autostart/*.desktop
 usr/share/applications/*.desktop
 frontend/.qm/*.qm usr/share/ukui-search/translations

frontend/frontend.pro

@@ -9,7 +9,7 @@ TEMPLATE = app
 PKGCONFIG += gio-2.0 glib-2.0 gio-unix-2.0
 CONFIG += c++11 link_pkgconfig no_keywords lrelease
 LIBS += -lxapian -lgsettings-qt -lquazip5 -lX11
-LIBS += -lukui-log4qt
+#LIBS += -lukui-log4qt
 # The following define makes your compiler emit warnings if you use
 # any Qt feature that has been marked deprecated (the exact warnings
 # depend on your compiler). Please consult the documentation of the
@@ -62,7 +62,7 @@ qm_files.path = /usr/share/ukui-search/translations/
 qm_files.files = $$OUT_PWD/.qm/*.qm
 
 schemes.path =  /usr/share/glib-2.0/schemas/
-schemes.files += ../data/org.ukui.search.data.gschema.xml ../data/org.ukui.log4qt.ukui-search.gschema.xml
+schemes.files += ../data/org.ukui.log4qt.ukui-search.gschema.xml
 
 INSTALLS += qm_files schemes
 
@@ -72,15 +72,5 @@ LIBS += -L$$OUT_PWD/../libchinese-segmentation -lchinese-segmentation \
 INCLUDEPATH += $$PWD/../libchinese-segmentation
 DEPENDPATH += $$PWD/../libchinese-segmentation
 
-INCLUDEPATH += $$PWD/../libsearch
-DEPENDPATH += $$PWD/../libsearch
-
-#DISTFILES += \
-#    ../data/ukui-search-menu.desktop \
-#    $$OUT_PWD/.qm/bo.qm \
-#    $$OUT_PWD/.qm/tr.qm \
-#    $$OUT_PWD/.qm/zh_CN.qm
-
 DISTFILES += \
     ../data/org.ukui.log4qt.ukui-search.gschema.xml \
-    ../data/org.ukui.search.data.gschema.xml

frontend/main.cpp

@@ -190,53 +190,12 @@ int main(int argc, char *argv[]) {
         parser.addOptions({debugOption, showsearch});
         parser.process(app);
     }*/
-    /*
-        // Create a fifo at ~/.config/org.ukui/ukui-search, the fifo is used to control the order of child processes' running.
-        QDir fifoDir = QDir(QDir::homePath()+"/.config/org.ukui/ukui-search");
-        if(!fifoDir.exists())
-            qDebug()<<"create fifo path"<<fifoDir.mkpath(fifoDir.absolutePath());
 
-        unlink(UKUI_SEARCH_PIPE_PATH);
-        int retval = mkfifo(UKUI_SEARCH_PIPE_PATH, 0777);
-        if(retval == -1)
-        {
-            qCritical()<<"creat fifo error!!";
-            syslog(LOG_ERR,"creat fifo error!!\n");
-            assert(false);
-            return -1;
-        }
-        qDebug()<<"create fifo success\n";
-    */
-    // Set max_user_watches to a number which is enough big.
     UkuiSearchQDBus usQDBus;
     usQDBus.setInotifyMaxUserWatches();
 
     // load chinese character and pinyin file to a Map
     FileUtils::loadHanziTable("://index/pinyinWithoutTone.txt");
-    /*-------------InotyifyRefact Test Start---------------*/
-//    QTime t1 = QTime::currentTime();
-//    InotifyManagerRefact* imr = new InotifyManagerRefact("/home");
-//    imr->start();
-//    QTime t2 = QTime::currentTime();
-//    qDebug() << t1;
-//    qDebug() << t2;
-    /*-------------InotyifyRefact Test End-----------------*/
-
-    /*-------------content index Test Start---------------*/
-//    QTime t3 = QTime::currentTime();
-//    FileTypeFilter* ftf = new FileTypeFilter("/home");
-//    ftf->Test();
-//    QTime t4 = QTime::currentTime();
-//    delete ftf;
-//    ftf = nullptr;
-//    qDebug() << t3;
-//    qDebug() << t4;
-    /*-------------content index Test End-----------------*/
-    /*-------------文本搜索 Test start-----------------*/
-//    FileSearcher *search = new FileSearcher();
-//    search->onKeywordSearchContent("重要器官移植⑤白血病");
-//    search->onKeywordSearchContent("g,e,x");
-    /*-------------文本搜索 Test End-----------------*/
 
     // Load translations
     QTranslator translator;
@@ -268,10 +227,6 @@ int main(int argc, char *argv[]) {
     MainWindow *w = new MainWindow;
     UkuiSearchDbusServices dbusService(w);
     qApp->setWindowIcon(QIcon::fromTheme("kylin-search"));
-    centerToScreen(w);
-
-    //请务必在connect之后初始化mainwindow的Gsettings，为了保证gsettings第一次读取到的配置值能成功应用
-    w->initGsettings();
 
     app.setActivationWindow(w);
 
@@ -283,22 +238,9 @@ int main(int argc, char *argv[]) {
 
     QObject::connect(&app, &QtSingleApplication::messageReceived, w, &MainWindow::bootOptionsFilter);
 
-    // Start app search thread
-//    AppMatch::getAppMatch()->start();
-
     // NEW_TODO
     // Set threads which in global thread pool expiry time in 5ms, some prolems here
     QThreadPool::globalInstance()->setExpiryTimeout(5);
 
-    // NEW_TODO
-    // First insdex start, the parameter us useless, should remove the parameter
-//    FirstIndex fi("/home/zhangzihao/Desktop");
-//    fi.start();
-
-    // NEW_TODO
-    // Inotify index start, the parameter us useless, should remove the parameter
-//    InotifyIndex* ii = InotifyIndex::getInstance("/home");
-//    ii->start();
-
     return app.exec();
 }

frontend/mainwindow.cpp

@@ -77,6 +77,7 @@ MainWindow::MainWindow(QWidget *parent) :
     m_sys_tray_icon->show();
     installEventFilter(this);
     initConnections();
+    initGsettings();
     //NEW_TODO, register plugins
 //    SearchPluginManager::getInstance()->registerPlugin(\\);
 //    m_stackedWidget->setPlugins(SearchPluginManager::getInstance()->getPluginIds());
@@ -154,7 +155,7 @@ void MainWindow::initConnections()
 {
     connect(m_sys_tray_icon, &QSystemTrayIcon::activated, this, &MainWindow::trayIconActivatedSlot);
     QObject::connect(this, &MainWindow::searchMethodChanged, this, [ = ](FileUtils::SearchMethod sm) {
-        this->m_searchMethodManager.searchMethod(sm);
+        FileUtils::searchMethod = sm;
     });
     connect(QApplication::primaryScreen(), &QScreen::geometryChanged, this, &MainWindow::monitorResolutionChange);
     connect(qApp, &QApplication::primaryScreenChanged, this, &MainWindow::primaryScreenChangedSlot);
@@ -234,12 +235,10 @@ void MainWindow::setSearchMethodConfig(const bool &create_index, const bool &no_
     if(create_index) {
         if(m_search_gsettings && m_search_gsettings->keys().contains(SEARCH_METHOD_KEY)) {
             m_search_gsettings->set(SEARCH_METHOD_KEY, true);
-        } else {
-            //调用创建索引接口
-            Q_EMIT this->searchMethodChanged(FileUtils::SearchMethod::INDEXSEARCH);
-            //创建索引十秒后重新搜索一次(如果用户十秒内没有退出搜索界面且没有重新搜索)
-            m_researchTimer->start();
         }
+        Q_EMIT this->searchMethodChanged(FileUtils::SearchMethod::INDEXSEARCH);
+        //创建索引十秒后重新搜索一次(如果用户十秒内没有退出搜索界面且没有重新搜索)
+        m_researchTimer->start();
     }
 }
 
@@ -503,10 +502,7 @@ bool MainWindow::tryHideMainwindow()
  */
 void MainWindow::setSearchMethod(const bool &is_index_search) {
     if(is_index_search) {
-        //调用创建索引接口
         Q_EMIT this->searchMethodChanged(FileUtils::SearchMethod::INDEXSEARCH);
-        //创建索引十秒后重新搜索一次(如果用户十秒内没有退出搜索界面且没有重新搜索)
-        m_researchTimer->start();
     } else {
         Q_EMIT this->searchMethodChanged(FileUtils::SearchMethod::DIRECTSEARCH);
         m_researchTimer->stop();

frontend/mainwindow.h

@@ -141,8 +141,6 @@ private:
     bool m_currentSearchAsked = false; //本次搜索是否已经询问过是否创建索引了
     QGSettings * m_search_gsettings = nullptr;
 
-    SearchMethodManager m_searchMethodManager;
-
     void setSearchMethod(const bool&);
     double getTransparentData();
     void initTimer();

libsearch/file-utils.cpp

@@ -25,6 +25,8 @@
 #include <gio/gdesktopappinfo.h>
 #include <QDBusMessage>
 #include <QDBusConnection>
+#include <QDomDocument>
+#include "gobject-template.h"
 
 using namespace Zeeker;
 size_t FileUtils::_max_index_count = 0;

libsearch/file-utils.h

@@ -33,7 +33,6 @@
 #include <QFileInfo>
 #include <QUrl>
 #include <QMap>
-#include <QDomDocument>
 #include <QQueue>
 #include <QDesktopServices>
 #include <QApplication>
@@ -55,7 +54,6 @@
 #include <common.h>
 
 #include "libsearch_global.h"
-#include "gobject-template.h"
 #include "common.h"
 //#define INITIAL_STATE 0
 //#define CREATING_INDEX 1

libsearch/index/index.pri

@@ -12,7 +12,7 @@ HEADERS += \
     $$PWD/pending-file-queue.h \
     $$PWD/pending-file.h \
     $$PWD/search-manager.h \
-    $$PWD/searchmethodmanager.h \
+    $$PWD/search-method-manager.h \
     $$PWD/traverse_bfs.h \
     $$PWD/ukui-search-qdbus.h
 
@@ -28,7 +28,7 @@ SOURCES += \
     $$PWD/pending-file-queue.cpp \
     $$PWD/pending-file.cpp \
     $$PWD/search-manager.cpp \
-    $$PWD/searchmethodmanager.cpp \
+    $$PWD/search-method-manager.cpp \
     $$PWD/traverse_bfs.cpp \
     $$PWD/ukui-search-qdbus.cpp
 

libsearch/index/search-method-manager.cpp

@@ -1,10 +1,20 @@
-#include "searchmethodmanager.h"
+#include "search-method-manager.h"
 using namespace Zeeker;
+static SearchMethodManager* global_instance = nullptr;
+
 SearchMethodManager::SearchMethodManager()
 {
     m_iw = InotifyWatch::getInstance(HOME_PATH);
 }
 
+SearchMethodManager *SearchMethodManager::getInstance()
+{
+    if(!global_instance) {
+        global_instance = new SearchMethodManager();
+    }
+    return global_instance;
+}
+
 void SearchMethodManager::searchMethod(FileUtils::SearchMethod sm) {
     qWarning() << "searchMethod start: " << static_cast<int>(sm);
     if(FileUtils::SearchMethod::INDEXSEARCH == sm || FileUtils::SearchMethod::DIRECTSEARCH == sm) {

libsearch/index/search-method-manager.h

@@ -7,9 +7,10 @@
 namespace Zeeker {
 class SearchMethodManager {
 public:
-    SearchMethodManager();
+    static SearchMethodManager *getInstance();
     void searchMethod(FileUtils::SearchMethod sm);
 private:
+    SearchMethodManager();
     FirstIndex m_fi;
 //    InotifyIndex* m_ii;
     InotifyWatch *m_iw = nullptr;

libsearch/libsearch.h

@@ -27,7 +27,7 @@
 
 #include "plugininterface/search-plugin-iface.h"
 #include "plugininterface/data-queue.h"
-#include "index/searchmethodmanager.h"
+#include "index/search-method-manager.h"
 #include "index/first-index.h"
 #include "index/ukui-search-qdbus.h"
 #include "index/search-manager.h"

ukui-search-service/main.cpp

@@ -0,0 +1,91 @@
+#include <QApplication>
+#include <QFile>
+#include <QTime>
+#include <QStandardPaths>
+#include <QDir>
+#include <syslog.h>
+#include <unistd.h>
+#include <QDebug>
+#include "ukui-search-service.h"
+using namespace Zeeker;
+void messageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
+{
+    QByteArray localMsg = msg.toLocal8Bit();
+    QByteArray currentTime = QTime::currentTime().toString().toLocal8Bit();
+
+    bool showDebug = true;
+//    QString logFilePath = QStandardPaths::writableLocation(QStandardPaths::TempLocation) + "/ukui-search.log";
+//    QString logFilePath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + "/.config/org.ukui/ukui-search/ukui-search.log";
+    QString logFilePath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + "/.config/org.ukui/ukui-search-service.log";
+    if (!QFile::exists(logFilePath)) {
+        showDebug = false;
+    }
+    FILE *log_file = nullptr;
+
+    if (showDebug) {
+        log_file = fopen(logFilePath.toLocal8Bit().constData(), "a+");
+    }
+
+    const char *file = context.file ? context.file : "";
+    const char *function = context.function ? context.function : "";
+    switch (type) {
+    case QtDebugMsg:
+        if (!log_file) {
+            break;
+        }
+        fprintf(log_file, "Debug: %s: %s (%s:%u, %s)\n", currentTime.constData(), localMsg.constData(), file, context.line, function);
+        break;
+    case QtInfoMsg:
+        fprintf(log_file? log_file: stdout, "Info: %s: %s (%s:%u, %s)\n", currentTime.constData(), localMsg.constData(), file, context.line, function);
+        break;
+    case QtWarningMsg:
+        fprintf(log_file? log_file: stderr, "Warning: %s: %s (%s:%u, %s)\n", currentTime.constData(), localMsg.constData(), file, context.line, function);
+        break;
+    case QtCriticalMsg:
+        fprintf(log_file? log_file: stderr, "Critical: %s: %s (%s:%u, %s)\n", currentTime.constData(), localMsg.constData(), file, context.line, function);
+        break;
+    case QtFatalMsg:
+        fprintf(log_file? log_file: stderr, "Fatal: %s: %s (%s:%u, %s)\n", currentTime.constData(), localMsg.constData(), file, context.line, function);
+        break;
+    }
+
+    if (log_file)
+        fclose(log_file);
+}
+int main(int argc, char *argv[])
+{
+    char *p_home = NULL;
+    unsigned int i = 0;
+    while(p_home == NULL) {
+        ::sleep(1);
+        ++i;
+        p_home = getenv("HOME");
+        if(i % 5 == 0) {
+            qWarning() << "I can't find home! I'm done here!!";
+            printf("I can't find home! I'm done here!!");
+            syslog(LOG_ERR, "I can't find home! I'm done here!!\n");
+        }
+    }
+    p_home = NULL;
+    while(!QDir(QDir::homePath()).exists()) {
+        qWarning() << "Home is not exits!!";
+        printf("Home is not exits!!");
+        syslog(LOG_ERR, "Home is not exits!!\n");
+        ::sleep(1);
+    }
+
+    // Output log to file
+    qInstallMessageHandler(messageOutput);
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+    QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
+    QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
+#endif
+    UkuiSearchService ukss(argc, argv, "ukui-search-service");
+    if (ukss.isRunning())
+        return 0;
+
+    return ukss.exec();
+}

ukui-search-service/ukui-search-service.cpp

@@ -0,0 +1,119 @@
+#include <QDebug>
+#include "ukui-search-service.h"
+#define UKUI_SEARCH_SCHEMAS "org.ukui.search.settings"
+#define SEARCH_METHOD_KEY "indexSearch"
+using namespace Zeeker;
+UkuiSearchService::UkuiSearchService(int &argc, char *argv[], const QString &applicationName): QtSingleApplication (applicationName, argc, argv)
+{
+    qDebug()<<"ukui search service constructor start";
+    setApplicationVersion(QString("v%1").arg(VERSION));
+    setQuitOnLastWindowClosed(false);
+
+    if (!this->isRunning()) {
+        connect(this, &QtSingleApplication::messageReceived, [=](QString msg) {
+            this->parseCmd(msg, true);
+        });
+        initGsettings();
+    }
+
+    //parse cmd
+    qDebug()<<"parse cmd";
+    auto message = this->arguments().join(' ').toUtf8();
+    parseCmd(message, !isRunning());
+
+    qDebug()<<"ukui search service constructor end";
+}
+
+void UkuiSearchService::parseCmd(QString msg, bool isPrimary)
+{
+    QCommandLineParser parser;
+
+    parser.addHelpOption();
+    parser.addVersionOption();
+
+    QCommandLineOption quitOption(QStringList()<<"q"<<"quit", tr("Stop service"));
+    parser.addOption(quitOption);
+
+    QCommandLineOption startOption(QStringList()<<"i"<<"index", tr("start or stop file index"), "option");
+    parser.addOption(startOption);
+
+//    QCommandLineOption statusOption(QStringList()<<"s"<<"status", tr("show status of file index service"));
+//    parser.addOption(statusOption);
+
+    if (isPrimary) {
+        const QStringList args = QString(msg).split(' ');
+        parser.process(args);
+        if(parser.isSet(startOption)) {
+            qDebug() << "options!!!!" << parser.value(startOption);
+            if(parser.value(startOption) == "start") {
+                indexServiceSwitch(true);
+            } else if (parser.value(startOption) == "stop") {
+                indexServiceSwitch(false);
+            }
+        }
+//        if(parser.isSet(statusOption)) {
+//        }
+        if (parser.isSet(quitOption)) {
+            qApp->quit();
+            return;
+        }
+    }
+    else {
+        if (arguments().count() < 2) {
+            parser.showHelp();
+        }
+        parser.process(arguments());
+        sendMessage(msg);
+    }
+}
+
+void UkuiSearchService::initGsettings()
+{
+    const QByteArray id(UKUI_SEARCH_SCHEMAS);
+    if(QGSettings::isSchemaInstalled(id)) {
+        m_SearchGsettings = new QGSettings(id);
+        connect(m_SearchGsettings, &QGSettings::changed, this, [ = ](const QString &key) {
+            if(key == SEARCH_METHOD_KEY) {
+                setSearchMethodByGsettings();
+            }
+        });
+        if(m_SearchGsettings->keys().contains(SEARCH_METHOD_KEY)) {
+            setSearchMethodByGsettings();
+        }
+    } else {
+        qWarning() << UKUI_SEARCH_SCHEMAS << " is not found!";
+    }
+}
+
+void UkuiSearchService::setSearchMethodByGsettings()
+{
+    bool isIndexSearch = m_SearchGsettings->get(SEARCH_METHOD_KEY).toBool();
+    if(isIndexSearch) {
+        FileUtils::searchMethod = FileUtils::SearchMethod::INDEXSEARCH;
+    } else {
+        FileUtils::searchMethod = FileUtils::SearchMethod::DIRECTSEARCH;
+    }
+    SearchMethodManager::getInstance()->searchMethod(FileUtils::searchMethod);
+}
+
+void UkuiSearchService::indexServiceSwitch(bool startIndex)
+{
+    if(startIndex) {
+        FileUtils::searchMethod = FileUtils::SearchMethod::INDEXSEARCH;
+    } else {
+        FileUtils::searchMethod = FileUtils::SearchMethod::DIRECTSEARCH;
+    }
+    SearchMethodManager::getInstance()->searchMethod(FileUtils::searchMethod);
+
+    const QByteArray id(UKUI_SEARCH_SCHEMAS);
+    if(QGSettings::isSchemaInstalled(id)) {
+        m_SearchGsettings = new QGSettings(id);
+        if(m_SearchGsettings->keys().contains(SEARCH_METHOD_KEY)) {
+            m_SearchGsettings->set(SEARCH_METHOD_KEY, startIndex);
+        } else {
+            qWarning() << SEARCH_METHOD_KEY << " is not found!";
+        }
+    } else {
+        qWarning() << UKUI_SEARCH_SCHEMAS << " is not found!";
+    }
+}

ukui-search-service/ukui-search-service.h

@@ -0,0 +1,28 @@
+#ifndef UKUISEARCHSERVICE_H
+#define UKUISEARCHSERVICE_H
+
+#include <QObject>
+#include <QCommandLineParser>
+#include <QGSettings/QGSettings>
+#include "qtsingleapplication.h"
+#include "search-method-manager.h"
+#include "common.h"
+#include "file-utils.h"
+namespace Zeeker {
+
+class UkuiSearchService : public QtSingleApplication
+{
+    Q_OBJECT
+public:
+    UkuiSearchService(int &argc, char *argv[], const QString &applicationName = "ukui-search-service");
+
+protected Q_SLOTS:
+    void parseCmd(QString msg, bool isPrimary);
+private:
+    void initGsettings();
+    void setSearchMethodByGsettings();
+    void indexServiceSwitch(bool startIndex = true);
+    QGSettings *m_SearchGsettings;
+};
+}
+#endif // UKUISEARCHSERVICE_H

ukui-search-service/ukui-search-service.pro

@@ -0,0 +1,45 @@
+QT += core gui dbus
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+
+TARGET = ukui-search-service
+VERSION = 1.0.0
+DEFINES += VERSION='\\"$${VERSION}\\"'
+CONFIG += c++11 link_pkgconfig no_keywords lrelease
+PKGCONFIG += gsettings-qt
+
+# The following define makes your compiler emit warnings if you use
+# any Qt feature that has been marked deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+include(../libsearch/libukui-search-headers.pri)
+include(../3rd-parties/qtsingleapplication/qtsingleapplication.pri)
+
+LIBS += -L$$OUT_PWD/../libsearch -lukui-search
+
+SOURCES += \
+        main.cpp \
+        ukui-search-service.cpp
+
+schemes.path =  /usr/share/glib-2.0/schemas/
+schemes.files += ../data/org.ukui.search.data.gschema.xml
+
+INSTALLS += schemes
+
+target.path = /usr/bin
+INSTALLS += target
+
+desktop.path = /etc/xdg/autostart
+desktop.files += ../data/ukui-search-service.desktop
+INSTALLS += desktop
+
+HEADERS += \
+    ukui-search-service.h

ukui-search.pro

@@ -3,7 +3,8 @@ SUBDIRS += $$PWD/libchinese-segmentation \
            $$PWD/libsearch \
            $$PWD/frontend \
            $$PWD/ukuisearch-systemdbus \
-           $$PWD/search-ukcc-plugin
+           $$PWD/search-ukcc-plugin \
+           $$PWD/ukui-search-service
 # The following define makes your compiler emit warnings if you use
 # any Qt feature that has been marked deprecated (the exact warnings
 # depend on your compiler). Please consult the documentation of the
@@ -16,6 +17,7 @@ DEFINES += QT_DEPRECATED_WARNINGS
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
 libsearch.depends += libchinese-segmentation
+ukui-search-service.depends += libsearch
 #src.depends = libsearch
 frontend.depends = libsearch