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Move Single Application to FetchContent

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This commit is contained in:
Jeremy Borgman
2025-05-21 18:37:38 -05:00
parent 4c1bb7226d
commit 0088727a96
27 changed files with 8 additions and 2621 deletions
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9
CMakeLists.txt
View File

@@ -43,6 +43,8 @@ FetchContent_Declare(
) )
FetchContent_MakeAvailable(qtColorWidgets) FetchContent_MakeAvailable(qtColorWidgets)
# This can be read from ${PROJECT_NAME} after project() is called # This can be read from ${PROJECT_NAME} after project() is called
if (APPLE) if (APPLE)
set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment version") set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment version")
@@ -111,7 +113,12 @@ if(USE_EXTERNAL_SINGLEAPPLICATION)
find_library(QTSINGLEAPPLICATION_LIBRARY NAMES ${qtsingleapplication_libs}) find_library(QTSINGLEAPPLICATION_LIBRARY NAMES ${qtsingleapplication_libs})
message(STATUS "Using external SingleApplication library") message(STATUS "Using external SingleApplication library")
else() else()
add_subdirectory(external/singleapplication) FetchContent_Declare(
singleApplication
GIT_REPOSITORY https://github.com/itay-grudev/SingleApplication.git
GIT_TAG v3.1.5
)
FetchContent_MakeAvailable(SingleApplication)
set(QTSINGLEAPPLICATION_LIBRARY SingleApplication::SingleApplication) set(QTSINGLEAPPLICATION_LIBRARY SingleApplication::SingleApplication)
endif() endif()

285
external/singleapplication/CHANGELOG.md vendored
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@@ -1,285 +0,0 @@
Changelog
=========
If by accident I have forgotten to credit someone in the CHANGELOG, email me and I will fix it.
__3.1.5__
* Improved library stability in edge cases and very rapid process initialisation
* Fixed Bug where the shared memory block may have been modified without a lock
* Fixed Bug causing instanceStarted() to not get emmited when a second instance
has been started before the primary has initiated it's QLocalServer.
__3.1.4__
---------
* Officially supporting and build-testing against Qt 5.15
* Fixed an MSVC C4996 warning that suggests using `strncpy_s`.
_Hennadii Chernyshchyk_
__3.1.3.1__
---------
* CMake build system improvements
* Fixed Clang Tidy warnings
_Hennadii Chernyshchyk_
__3.1.3__
---------
* Improved `CMakeLists.txt`
_Hennadii Chernyshchyk_
__3.1.2__
---------
* Fix a crash when exiting an application on Android and iOS
_Emeric Grange_
__3.1.1a__
----------
* Added currentUser() method that returns the user the current instance is running as.
_Leander Schulten_
__3.1.0a__
----------
* Added primaryUser() method that returns the user the primary instance is running as.
__3.0.19__
----------
* Fixed code warning for depricated functions in Qt 5.10 related to `QTime` and `qrand()`.
_Hennadii Chernyshchyk_
_Anton Filimonov_
_Jonas Kvinge_
__3.0.18__
----------
* Fallback to standard QApplication class on iOS and Android systems where
the library is not supported.
* Added Build CI tests to verify the library builds successfully on Linux, Windows and MacOS across multiple Qt versions.
_Anton Filimonov_
__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.

34
external/singleapplication/CMakeLists.txt vendored
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@@ -1,34 +0,0 @@
cmake_minimum_required(VERSION 3.18.0)
project(SingleApplication LANGUAGES CXX)
set(CMAKE_AUTOMOC ON)
add_library(${PROJECT_NAME} STATIC
singleapplication.cpp
singleapplication_p.cpp
)
add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
# Find dependencies
find_package(Qt5 COMPONENTS Network REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Network)
if(QAPPLICATION_CLASS STREQUAL QApplication)
find_package(Qt5 COMPONENTS Widgets REQUIRED)
target_link_libraries(${PROJECT_NAME} PUBLIC Qt5::Widgets)
elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
find_package(Qt5 COMPONENTS Gui REQUIRED)
target_link_libraries(${PROJECT_NAME} PUBLIC Qt5::Gui)
else()
set(QAPPLICATION_CLASS QCoreApplication)
find_package(Qt5 COMPONENTS Core REQUIRED)
target_link_libraries(${PROJECT_NAME} PUBLIC Qt5::Core)
endif()
if(WIN32)
target_link_libraries(${PROJECT_NAME} PRIVATE advapi32)
endif()
target_compile_definitions(${PROJECT_NAME} PUBLIC QAPPLICATION_CLASS=${QAPPLICATION_CLASS})
target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

24
external/singleapplication/LICENSE vendored
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@@ -1,24 +0,0 @@
The MIT License (MIT)
Copyright (c) Itay Grudev 2015 - 2020
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.

304
external/singleapplication/README.md vendored
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@@ -1,304 +0,0 @@
SingleApplication
=================
[![CI](https://github.com/itay-grudev/SingleApplication/workflows/CI:%20Build%20Test/badge.svg)](https://github.com/itay-grudev/SingleApplication/actions)
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.
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. 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)
target_link_libraries(${PROJECT_NAME} SingleApplication::SingleApplication)
```
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.
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.*
Examples
--------
There are three examples provided in this repository:
* Basic example that prevents a secondary instance from starting [`examples/basic`](https://github.com/itay-grudev/SingleApplication/tree/master/examples/basic)
* An example of a graphical application raising it's parent window [`examples/calculator`](https://github.com/itay-grudev/SingleApplication/tree/master/examples/calculator)
* A console application sending the primary instance it's command line parameters [`examples/sending_arguments`](https://github.com/itay-grudev/SingleApplication/tree/master/examples/sending_arguments)
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.
---
```cpp
QString SingleApplication::primaryUser()
```
Returns the username the primary instance is running as.
---
```cpp
QString SingleApplication::currentUser()
```
Returns the username the current instance is running as.
### 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.

1
external/singleapplication/SingleApplication vendored
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@@ -1 +0,0 @@
#include "singleapplication.h"

46
external/singleapplication/Windows.md vendored
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@@ -1,46 +0,0 @@
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

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@@ -1,13 +0,0 @@
cmake_minimum_required(VERSION 3.7.0)
project(basic LANGUAGES CXX)
# SingleApplication base class
set(QAPPLICATION_CLASS QCoreApplication)
add_executable(basic main.cpp)
find_package(Qt5 COMPONENTS Core REQUIRED)
add_subdirectory(../.. SingleApplication)
target_link_libraries(${PROJECT_NAME} SingleApplication::SingleApplication)

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external/singleapplication/examples/basic/basic.pro vendored
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@@ -1,5 +0,0 @@
# Single Application implementation
include(../../singleapplication.pri)
DEFINES += QAPPLICATION_CLASS=QCoreApplication
SOURCES += main.cpp

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external/singleapplication/examples/basic/main.cpp vendored
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@@ -1,11 +0,0 @@
#include <singleapplication.h>
int main(int argc, char* argv[])
{
// Allow secondary instances
SingleApplication app(argc, argv);
qWarning() << "Started a new instance";
return app.exec();
}

20
external/singleapplication/examples/calculator/CMakeLists.txt vendored
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@@ -1,20 +0,0 @@
cmake_minimum_required(VERSION 3.7.0)
project(calculator LANGUAGES CXX)
set(CMAKE_AUTOMOC ON)
# SingleApplication base class
set(QAPPLICATION_CLASS QApplication)
add_executable(${PROJECT_NAME}
button.h
calculator.h
button.cpp
calculator.cpp
main.cpp
)
find_package(Qt5 COMPONENTS Widgets REQUIRED)
add_subdirectory(../.. SingleApplication)
target_link_libraries(${PROJECT_NAME} SingleApplication::SingleApplication)

73
external/singleapplication/examples/calculator/button.cpp vendored
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@@ -1,73 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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 <QtWidgets>
#include "button.h"
//! [0]
Button::Button(const QString& text, QWidget* parent)
: QToolButton(parent)
{
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
setText(text);
}
//! [0]
//! [1]
QSize Button::sizeHint() const
//! [1] //! [2]
{
QSize size = QToolButton::sizeHint();
size.rheight() += 20;
size.rwidth() = qMax(size.width(), size.height());
return size;
}
//! [2]

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@@ -1,68 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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 BUTTON_H
#define BUTTON_H
#include <QToolButton>
//! [0]
class Button : public QToolButton
{
Q_OBJECT
public:
explicit Button(const QString& text, QWidget* parent = 0);
QSize sizeHint() const Q_DECL_OVERRIDE;
};
//! [0]
#endif

414
external/singleapplication/examples/calculator/calculator.cpp vendored
View File

@@ -1,414 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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 <QtWidgets>
#include <cmath>
#include "button.h"
#include "calculator.h"
//! [0]
Calculator::Calculator(QWidget* parent)
: QWidget(parent)
{
sumInMemory = 0.0;
sumSoFar = 0.0;
factorSoFar = 0.0;
waitingForOperand = true;
//! [0]
//! [1]
display = new QLineEdit("0");
//! [1] //! [2]
display->setReadOnly(true);
display->setAlignment(Qt::AlignRight);
display->setMaxLength(15);
QFont font = display->font();
font.setPointSize(font.pointSize() + 8);
display->setFont(font);
//! [2]
//! [4]
for (int i = 0; i < NumDigitButtons; ++i) {
digitButtons[i] =
createButton(QString::number(i), SLOT(digitClicked()));
}
Button* pointButton = createButton(".", SLOT(pointClicked()));
Button* changeSignButton =
createButton("\302\261", SLOT(changeSignClicked()));
Button* backspaceButton =
createButton("Backspace", SLOT(backspaceClicked()));
Button* clearButton = createButton("Clear", SLOT(clear()));
Button* clearAllButton = createButton("Clear All", SLOT(clearAll()));
Button* clearMemoryButton = createButton("MC", SLOT(clearMemory()));
Button* readMemoryButton = createButton("MR", SLOT(readMemory()));
Button* setMemoryButton = createButton("MS", SLOT(setMemory()));
Button* addToMemoryButton = createButton("M+", SLOT(addToMemory()));
Button* divisionButton =
createButton("\303\267", SLOT(multiplicativeOperatorClicked()));
Button* timesButton =
createButton("\303\227", SLOT(multiplicativeOperatorClicked()));
Button* minusButton = createButton("-", SLOT(additiveOperatorClicked()));
Button* plusButton = createButton("+", SLOT(additiveOperatorClicked()));
Button* squareRootButton =
createButton("Sqrt", SLOT(unaryOperatorClicked()));
Button* powerButton =
createButton("x\302\262", SLOT(unaryOperatorClicked()));
Button* reciprocalButton =
createButton("1/x", SLOT(unaryOperatorClicked()));
Button* equalButton = createButton("=", SLOT(equalClicked()));
//! [4]
//! [5]
QGridLayout* mainLayout = new QGridLayout;
//! [5] //! [6]
mainLayout->setSizeConstraint(QLayout::SetFixedSize);
mainLayout->addWidget(display, 0, 0, 1, 6);
mainLayout->addWidget(backspaceButton, 1, 0, 1, 2);
mainLayout->addWidget(clearButton, 1, 2, 1, 2);
mainLayout->addWidget(clearAllButton, 1, 4, 1, 2);
mainLayout->addWidget(clearMemoryButton, 2, 0);
mainLayout->addWidget(readMemoryButton, 3, 0);
mainLayout->addWidget(setMemoryButton, 4, 0);
mainLayout->addWidget(addToMemoryButton, 5, 0);
for (int i = 1; i < NumDigitButtons; ++i) {
int row = ((9 - i) / 3) + 2;
int column = ((i - 1) % 3) + 1;
mainLayout->addWidget(digitButtons[i], row, column);
}
mainLayout->addWidget(digitButtons[0], 5, 1);
mainLayout->addWidget(pointButton, 5, 2);
mainLayout->addWidget(changeSignButton, 5, 3);
mainLayout->addWidget(divisionButton, 2, 4);
mainLayout->addWidget(timesButton, 3, 4);
mainLayout->addWidget(minusButton, 4, 4);
mainLayout->addWidget(plusButton, 5, 4);
mainLayout->addWidget(squareRootButton, 2, 5);
mainLayout->addWidget(powerButton, 3, 5);
mainLayout->addWidget(reciprocalButton, 4, 5);
mainLayout->addWidget(equalButton, 5, 5);
setLayout(mainLayout);
setWindowTitle("Calculator");
}
//! [6]
//! [7]
void Calculator::digitClicked()
{
Button* clickedButton = qobject_cast<Button*>(sender());
int digitValue = clickedButton->text().toInt();
if (display->text() == "0" && digitValue == 0.0)
return;
if (waitingForOperand) {
display->clear();
waitingForOperand = false;
}
display->setText(display->text() + QString::number(digitValue));
}
//! [7]
//! [8]
void Calculator::unaryOperatorClicked()
//! [8] //! [9]
{
Button* clickedButton = qobject_cast<Button*>(sender());
QString clickedOperator = clickedButton->text();
double operand = display->text().toDouble();
double result = 0.0;
if (clickedOperator == "Sqrt") {
if (operand < 0.0) {
abortOperation();
return;
}
result = std::sqrt(operand);
} else if (clickedOperator == "x\302\262") {
result = std::pow(operand, 2.0);
} else if (clickedOperator == "1/x") {
if (operand == 0.0) {
abortOperation();
return;
}
result = 1.0 / operand;
}
display->setText(QString::number(result));
waitingForOperand = true;
}
//! [9]
//! [10]
void Calculator::additiveOperatorClicked()
//! [10] //! [11]
{
Button* clickedButton = qobject_cast<Button*>(sender());
QString clickedOperator = clickedButton->text();
double operand = display->text().toDouble();
//! [11] //! [12]
if (!pendingMultiplicativeOperator.isEmpty()) {
//! [12] //! [13]
if (!calculate(operand, pendingMultiplicativeOperator)) {
abortOperation();
return;
}
display->setText(QString::number(factorSoFar));
operand = factorSoFar;
factorSoFar = 0.0;
pendingMultiplicativeOperator.clear();
}
//! [13] //! [14]
if (!pendingAdditiveOperator.isEmpty()) {
//! [14] //! [15]
if (!calculate(operand, pendingAdditiveOperator)) {
abortOperation();
return;
}
display->setText(QString::number(sumSoFar));
} else {
sumSoFar = operand;
}
//! [15] //! [16]
pendingAdditiveOperator = clickedOperator;
//! [16] //! [17]
waitingForOperand = true;
}
//! [17]
//! [18]
void Calculator::multiplicativeOperatorClicked()
{
Button* clickedButton = qobject_cast<Button*>(sender());
QString clickedOperator = clickedButton->text();
double operand = display->text().toDouble();
if (!pendingMultiplicativeOperator.isEmpty()) {
if (!calculate(operand, pendingMultiplicativeOperator)) {
abortOperation();
return;
}
display->setText(QString::number(factorSoFar));
} else {
factorSoFar = operand;
}
pendingMultiplicativeOperator = clickedOperator;
waitingForOperand = true;
}
//! [18]
//! [20]
void Calculator::equalClicked()
{
double operand = display->text().toDouble();
if (!pendingMultiplicativeOperator.isEmpty()) {
if (!calculate(operand, pendingMultiplicativeOperator)) {
abortOperation();
return;
}
operand = factorSoFar;
factorSoFar = 0.0;
pendingMultiplicativeOperator.clear();
}
if (!pendingAdditiveOperator.isEmpty()) {
if (!calculate(operand, pendingAdditiveOperator)) {
abortOperation();
return;
}
pendingAdditiveOperator.clear();
} else {
sumSoFar = operand;
}
display->setText(QString::number(sumSoFar));
sumSoFar = 0.0;
waitingForOperand = true;
}
//! [20]
//! [22]
void Calculator::pointClicked()
{
if (waitingForOperand)
display->setText("0");
if (!display->text().contains('.'))
display->setText(display->text() + ".");
waitingForOperand = false;
}
//! [22]
//! [24]
void Calculator::changeSignClicked()
{
QString text = display->text();
double value = text.toDouble();
if (value > 0.0) {
text.prepend("-");
} else if (value < 0.0) {
text.remove(0, 1);
}
display->setText(text);
}
//! [24]
//! [26]
void Calculator::backspaceClicked()
{
if (waitingForOperand)
return;
QString text = display->text();
text.chop(1);
if (text.isEmpty()) {
text = "0";
waitingForOperand = true;
}
display->setText(text);
}
//! [26]
//! [28]
void Calculator::clear()
{
if (waitingForOperand)
return;
display->setText("0");
waitingForOperand = true;
}
//! [28]
//! [30]
void Calculator::clearAll()
{
sumSoFar = 0.0;
factorSoFar = 0.0;
pendingAdditiveOperator.clear();
pendingMultiplicativeOperator.clear();
display->setText("0");
waitingForOperand = true;
}
//! [30]
//! [32]
void Calculator::clearMemory()
{
sumInMemory = 0.0;
}
void Calculator::readMemory()
{
display->setText(QString::number(sumInMemory));
waitingForOperand = true;
}
void Calculator::setMemory()
{
equalClicked();
sumInMemory = display->text().toDouble();
}
void Calculator::addToMemory()
{
equalClicked();
sumInMemory += display->text().toDouble();
}
//! [32]
//! [34]
Button* Calculator::createButton(const QString& text, const char* member)
{
Button* button = new Button(text);
connect(button, SIGNAL(clicked()), this, member);
return button;
}
//! [34]
//! [36]
void Calculator::abortOperation()
{
clearAll();
display->setText("####");
}
//! [36]
//! [38]
bool Calculator::calculate(double rightOperand, const QString& pendingOperator)
{
if (pendingOperator == "+") {
sumSoFar += rightOperand;
} else if (pendingOperator == "-") {
sumSoFar -= rightOperand;
} else if (pendingOperator == "\303\227") {
factorSoFar *= rightOperand;
} else if (pendingOperator == "\303\267") {
if (rightOperand == 0.0)
return false;
factorSoFar /= rightOperand;
}
return true;
}
//! [38]

120
external/singleapplication/examples/calculator/calculator.h vendored
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@@ -1,120 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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 CALCULATOR_H
#define CALCULATOR_H
#include <QWidget>
QT_BEGIN_NAMESPACE
class QLineEdit;
QT_END_NAMESPACE
class Button;
//! [0]
class Calculator : public QWidget
{
Q_OBJECT
public:
Calculator(QWidget* parent = 0);
private slots:
void digitClicked();
void unaryOperatorClicked();
void additiveOperatorClicked();
void multiplicativeOperatorClicked();
void equalClicked();
void pointClicked();
void changeSignClicked();
void backspaceClicked();
void clear();
void clearAll();
void clearMemory();
void readMemory();
void setMemory();
void addToMemory();
//! [0]
//! [1]
private:
//! [1] //! [2]
Button* createButton(const QString& text, const char* member);
void abortOperation();
bool calculate(double rightOperand, const QString& pendingOperator);
//! [2]
//! [3]
double sumInMemory;
//! [3] //! [4]
double sumSoFar;
//! [4] //! [5]
double factorSoFar;
//! [5] //! [6]
QString pendingAdditiveOperator;
//! [6] //! [7]
QString pendingMultiplicativeOperator;
//! [7] //! [8]
bool waitingForOperand;
//! [8]
//! [9]
QLineEdit* display;
//! [9] //! [10]
enum
{
NumDigitButtons = 10
};
Button* digitButtons[NumDigitButtons];
};
//! [10]
#endif

11
external/singleapplication/examples/calculator/calculator.pro vendored
View File

@@ -1,11 +0,0 @@
QT += widgets
HEADERS = button.h \
calculator.h
SOURCES = button.cpp \
calculator.cpp \
main.cpp
# Single Application implementation
include(../../singleapplication.pri)
DEFINES += QAPPLICATION_CLASS=QApplication

71
external/singleapplication/examples/calculator/main.cpp vendored
View File

@@ -1,71 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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 <QApplication>
#include <singleapplication.h>
#include "calculator.h"
int main(int argc, char* argv[])
{
SingleApplication app(argc, argv);
Calculator calc;
QObject::connect(&app, &SingleApplication::instanceStarted, [&calc]() {
calc.raise();
calc.activateWindow();
});
calc.show();
return app.exec();
}

19
external/singleapplication/examples/sending_arguments/CMakeLists.txt vendored
View File

@@ -1,19 +0,0 @@
cmake_minimum_required(VERSION 3.7.0)
project(sending_arguments LANGUAGES CXX)
set(CMAKE_AUTOMOC ON)
# SingleApplication base class
set(QAPPLICATION_CLASS QCoreApplication)
add_executable(${PROJECT_NAME}
main.cpp
messagereceiver.cpp
messagereceiver.h
main.cpp
)
find_package(Qt5 COMPONENTS Core REQUIRED)
add_subdirectory(../.. SingleApplication)
target_link_libraries(${PROJECT_NAME} SingleApplication::SingleApplication)

26
external/singleapplication/examples/sending_arguments/main.cpp vendored
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@@ -1,26 +0,0 @@
#include "messagereceiver.h"
#include <singleapplication.h>
int main(int argc, char* argv[])
{
// Allow secondary instances
SingleApplication app(argc, argv, true);
MessageReceiver msgReceiver;
// If this is a secondary instance
if (app.isSecondary()) {
app.sendMessage(app.arguments().join(' ').toUtf8());
qDebug() << "App already running.";
qDebug() << "Primary instance PID: " << app.primaryPid();
qDebug() << "Primary instance user: " << app.primaryUser();
return 0;
} else {
QObject::connect(&app,
&SingleApplication::receivedMessage,
&msgReceiver,
&MessageReceiver::receivedMessage);
}
return app.exec();
}

12
external/singleapplication/examples/sending_arguments/messagereceiver.cpp vendored
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@@ -1,12 +0,0 @@
#include "messagereceiver.h"
#include <QDebug>
MessageReceiver::MessageReceiver(QObject* parent)
: QObject(parent)
{}
void MessageReceiver::receivedMessage(int instanceId, QByteArray message)
{
qDebug() << "Received message from instance: " << instanceId;
qDebug() << "Message Text: " << message;
}

15
external/singleapplication/examples/sending_arguments/messagereceiver.h vendored
View File

@@ -1,15 +0,0 @@
#ifndef MESSAGERECEIVER_H
#define MESSAGERECEIVER_H
#include <QObject>
class MessageReceiver : public QObject
{
Q_OBJECT
public:
explicit MessageReceiver(QObject* parent = 0);
public slots:
void receivedMessage(int instanceId, QByteArray message);
};
#endif // MESSAGERECEIVER_H

9
external/singleapplication/examples/sending_arguments/sending_arguments.pro vendored
View File

@@ -1,9 +0,0 @@
# Single Application implementation
include(../../singleapplication.pri)
DEFINES += QAPPLICATION_CLASS=QCoreApplication
SOURCES += main.cpp \
messagereceiver.cpp
HEADERS += \
messagereceiver.h

285
external/singleapplication/singleapplication.cpp vendored
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@@ -1,285 +0,0 @@
// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2020
//
// 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/QByteArray>
#include <QtCore/QElapsedTimer>
#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 allowSecondary Whether to enable secondary instance support
* @param options Optional flags to toggle specific behaviour
* @param timeout Maximum time blocking functions are allowed during app load
*/
SingleApplication::SingleApplication(int& argc,
char* argv[],
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();
// To mitigate QSharedMemory issues with large amount of processes
// attempting to attach at the same time
d->randomSleep();
#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
if (!d->memory->lock()) {
qCritical()
<< "SingleApplication: Unable to lock memory block after create.";
abortSafely();
}
d->initializeMemoryBlock();
} else {
if (d->memory->error() == QSharedMemory::AlreadyExists) {
// Attempt to attach to the memory segment
if (!d->memory->attach()) {
qCritical() << "SingleApplication: Unable to attach to shared "
"memory block.";
abortSafely();
}
if (!d->memory->lock()) {
qCritical() << "SingleApplication: Unable to lock memory block "
"after attach.";
abortSafely();
}
} else {
qCritical() << "SingleApplication: Unable to create block.";
abortSafely();
}
}
auto* inst = static_cast<InstancesInfo*>(d->memory->data());
QElapsedTimer time;
time.start();
// Make sure the shared memory block is initialised and in consistent state
while (true) {
// If the shared memory block's checksum is valid continue
if (d->blockChecksum() == inst->checksum)
break;
// If more than 5s have elapsed, assume the primary instance crashed and
// assume it's position
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();
}
// Otherwise wait for a random period and try again. The random sleep
// here limits the probability of a collision between two racing apps
// and allows the app to initialise faster
if (!d->memory->unlock()) {
qDebug()
<< "SingleApplication: Unable to unlock memory for random wait.";
qDebug() << d->memory->errorString();
}
d->randomSleep();
if (!d->memory->lock()) {
qCritical()
<< "SingleApplication: Unable to lock memory after random wait.";
abortSafely();
}
}
if (inst->primary == false) {
d->startPrimary();
if (!d->memory->unlock()) {
qDebug() << "SingleApplication: Unable to unlock memory after "
"primary start.";
qDebug() << d->memory->errorString();
}
return;
}
// Check if another instance can be started
if (allowSecondary) {
d->startSecondary();
if (d->options & Mode::SecondaryNotification) {
d->connectToPrimary(timeout,
SingleApplicationPrivate::SecondaryInstance);
}
if (!d->memory->unlock()) {
qDebug() << "SingleApplication: Unable to unlock memory after "
"secondary start.";
qDebug() << d->memory->errorString();
}
return;
}
if (!d->memory->unlock()) {
qDebug()
<< "SingleApplication: Unable to unlock memory at end of execution.";
qDebug() << d->memory->errorString();
}
d->connectToPrimary(timeout, SingleApplicationPrivate::NewInstance);
delete d;
::exit(EXIT_SUCCESS);
}
SingleApplication::~SingleApplication()
{
Q_D(SingleApplication);
delete d;
}
/**
* Checks if the current application instance is primary.
* @return Returns true if the instance is primary, false otherwise.
*/
bool SingleApplication::isPrimary()
{
Q_D(SingleApplication);
return d->server != nullptr;
}
/**
* Checks if the current application instance is secondary.
* @return Returns true if the instance is secondary, false otherwise.
*/
bool SingleApplication::isSecondary()
{
Q_D(SingleApplication);
return d->server == nullptr;
}
/**
* Allows you to identify an instance by returning unique consecutive instance
* ids. It is reset when the first (primary) instance of your app starts and
* only incremented afterwards.
* @return Returns a unique instance id.
*/
quint32 SingleApplication::instanceId()
{
Q_D(SingleApplication);
return d->instanceNumber;
}
/**
* Returns the OS PID (Process Identifier) of the process running the primary
* instance. Especially useful when SingleApplication is coupled with OS.
* specific APIs.
* @return Returns the primary instance PID.
*/
qint64 SingleApplication::primaryPid()
{
Q_D(SingleApplication);
return d->primaryPid();
}
/**
* Returns the username the primary instance is running as.
* @return Returns the username the primary instance is running as.
*/
QString SingleApplication::primaryUser()
{
Q_D(SingleApplication);
return d->primaryUser();
}
/**
* Returns the username the current instance is running as.
* @return Returns the username the current instance is running as.
*/
QString SingleApplication::currentUser()
{
Q_D(SingleApplication);
return d->getUsername();
}
/**
* Sends message to the Primary Instance.
* @param message The message to send.
* @param timeout the maximum timeout in milliseconds for blocking functions.
* @return true if the message was sent successfuly, false otherwise.
*/
bool SingleApplication::sendMessage(const QByteArray& message, int timeout)
{
Q_D(SingleApplication);
// Nobody to connect to
if (isPrimary())
return false;
// Make sure the socket is connected
if (!d->connectToPrimary(timeout, SingleApplicationPrivate::Reconnect))
return false;
d->socket->write(message);
bool dataWritten = d->socket->waitForBytesWritten(timeout);
d->socket->flush();
return dataWritten;
}
/**
* Cleans up the shared memory block and exits with a failure.
* This function halts program execution.
*/
void SingleApplication::abortSafely()
{
Q_D(SingleApplication);
qCritical() << "SingleApplication: " << d->memory->error()
<< d->memory->errorString();
delete d;
::exit(EXIT_FAILURE);
}

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@@ -1,153 +0,0 @@
// 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
using app_t = QAPPLICATION_CLASS;
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[],
bool allowSecondary = false,
Options options = Mode::User,
int timeout = 1000);
~SingleApplication() override;
/**
* @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 Returns the username of the user running the primary instance
* @returns {QString}
*/
QString primaryUser();
/**
* @brief Returns the username of the current user
* @returns {QString}
*/
QString currentUser();
/**
* @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(const QByteArray& message, int timeout = 100);
Q_SIGNALS:
void instanceStarted();
void receivedMessage(quint32 instanceId, QByteArray message);
private:
SingleApplicationPrivate* d_ptr;
Q_DECLARE_PRIVATE(SingleApplication)
void abortSafely();
};
Q_DECLARE_OPERATORS_FOR_FLAGS(SingleApplication::Options)
#endif // SINGLE_APPLICATION_H

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@@ -1,20 +0,0 @@
QT += core network
CONFIG += c++11
HEADERS += $$PWD/SingleApplication \
$$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

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@@ -1,475 +0,0 @@
// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2020
//
// 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 <cstddef>
#include <cstdlib>
#include <QtCore/QByteArray>
#include <QtCore/QCryptographicHash>
#include <QtCore/QDataStream>
#include <QtCore/QDir>
#include <QtCore/QElapsedTimer>
#include <QtCore/QThread>
#include <QtNetwork/QLocalServer>
#include <QtNetwork/QLocalSocket>
#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
#include <QtCore/QRandomGenerator>
#else
#include <QtCore/QDateTime>
#endif
#include "singleapplication.h"
#include "singleapplication_p.h"
#ifdef Q_OS_UNIX
#include <pwd.h>
#include <sys/types.h>
#include <unistd.h>
#endif
#ifdef Q_OS_WIN
#include <lmcons.h>
#include <windows.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;
}
if (memory != nullptr) {
memory->lock();
auto* inst = static_cast<InstancesInfo*>(memory->data());
if (server != nullptr) {
server->close();
delete server;
inst->primary = false;
inst->primaryPid = -1;
inst->primaryUser[0] = '\0';
inst->checksum = blockChecksum();
}
memory->unlock();
delete memory;
}
}
QString SingleApplicationPrivate::getUsername()
{
#ifdef Q_OS_WIN
wchar_t username[UNLEN + 1];
// Specifies size of the buffer on input
DWORD usernameLength = UNLEN + 1;
if (GetUserNameW(username, &usernameLength))
return QString::fromWCharArray(username);
#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)
return QString::fromLocal8Bit(qgetenv("USERNAME"));
#else
return qEnvironmentVariable("USERNAME");
#endif
#endif
#ifdef Q_OS_UNIX
QString username;
uid_t uid = geteuid();
struct passwd* pw = getpwuid(uid);
if (pw)
username = QString::fromLocal8Bit(pw->pw_name);
if (username.isEmpty()) {
#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)
username = QString::fromLocal8Bit(qgetenv("USER"));
#else
username = qEnvironmentVariable("USER");
#endif
}
return username;
#endif
}
void SingleApplicationPrivate::genBlockServerName()
{
QCryptographicHash appData(QCryptographicHash::Sha256);
appData.addData("SingleApplication", 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) {
appData.addData(getUsername().toUtf8());
}
// 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()
{
auto* inst = static_cast<InstancesInfo*>(memory->data());
inst->primary = false;
inst->secondary = 0;
inst->primaryPid = -1;
inst->primaryUser[0] = '\0';
inst->checksum = blockChecksum();
}
void SingleApplicationPrivate::startPrimary()
{
Q_Q(SingleApplication);
// Reset the number of connections
auto* inst = static_cast<InstancesInfo*>(memory->data());
inst->primary = true;
inst->primaryPid = q->applicationPid();
qstrncpy(inst->primaryUser,
getUsername().toUtf8().data(),
sizeof(inst->primaryUser));
inst->checksum = blockChecksum();
instanceNumber = 0;
// 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);
}
void SingleApplicationPrivate::startSecondary()
{
auto* inst = static_cast<InstancesInfo*>(memory->data());
inst->secondary += 1;
inst->checksum = blockChecksum();
instanceNumber = inst->secondary;
}
bool SingleApplicationPrivate::connectToPrimary(int timeout,
ConnectionType connectionType)
{
QElapsedTimer time;
time.start();
// Connect to the Local Server of the Primary Instance if not already
// connected.
if (socket == nullptr) {
socket = new QLocalSocket();
}
if (socket->state() == QLocalSocket::ConnectedState)
return true;
if (socket->state() != QLocalSocket::ConnectedState) {
while (true) {
randomSleep();
if (socket->state() != QLocalSocket::ConnectingState)
socket->connectToServer(blockServerName);
if (socket->state() == QLocalSocket::ConnectingState) {
socket->waitForConnected(timeout - time.elapsed());
}
// If connected break out of the loop
if (socket->state() == QLocalSocket::ConnectedState)
break;
// If elapsed time since start is longer than the method timeout
// return
if (time.elapsed() >= timeout)
return false;
}
}
// Initialisation message according to the SingleApplication protocol
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();
if (socket->waitForBytesWritten(timeout - time.elapsed()))
return true;
return false;
}
quint16 SingleApplicationPrivate::blockChecksum()
{
return qChecksum(static_cast<const char*>(memory->data()),
offsetof(InstancesInfo, checksum));
}
qint64 SingleApplicationPrivate::primaryPid()
{
qint64 pid;
memory->lock();
auto* inst = static_cast<InstancesInfo*>(memory->data());
pid = inst->primaryPid;
memory->unlock();
return pid;
}
QString SingleApplicationPrivate::primaryUser()
{
QByteArray username;
memory->lock();
auto* inst = static_cast<InstancesInfo*>(memory->data());
username = inst->primaryUser;
memory->unlock();
return QString::fromUtf8(username);
}
/**
* @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);
}
void SingleApplicationPrivate::randomSleep()
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
QThread::msleep(QRandomGenerator::global()->bounded(8u, 18u));
#else
qsrand(QDateTime::currentMSecsSinceEpoch() %
std::numeric_limits<uint>::max());
QThread::msleep(8 + static_cast<unsigned long>(static_cast<float>(qrand()) /
RAND_MAX * 10));
#endif
}

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// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2020
//
// 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 "singleapplication.h"
#include <QtCore/QSharedMemory>
#include <QtNetwork/QLocalServer>
#include <QtNetwork/QLocalSocket>
struct InstancesInfo
{
bool primary;
quint32 secondary;
qint64 primaryPid;
char primaryUser[128];
quint16 checksum; // Must be the last field
};
struct ConnectionInfo
{
qint64 msgLen = 0;
quint32 instanceId = 0;
quint8 stage = 0;
};
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() override;
QString getUsername();
void genBlockServerName();
void initializeMemoryBlock();
void startPrimary();
void startSecondary();
bool connectToPrimary(int msecs, ConnectionType connectionType);
quint16 blockChecksum();
qint64 primaryPid();
QString primaryUser();
void readInitMessageHeader(QLocalSocket* socket);
void readInitMessageBody(QLocalSocket* socket);
void randomSleep();
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