Implement RemapButton feature

Many changes were made here, too many to list here.

src/logid/CMakeLists.txt

@@ -11,12 +11,16 @@ find_package(PkgConfig REQUIRED)
 add_executable(logid
         logid.cpp
         util/log.cpp
+        InputDevice.cpp
         DeviceManager.cpp
         Device.cpp
         Receiver.cpp
         Configuration.cpp
         features/DPI.cpp
         features/SmartShift.cpp
+        features/RemapButton.cpp
+        actions/Action.cpp
+        actions/KeypressAction.cpp
         backend/Error.cpp
         backend/raw/DeviceMonitor.cpp
         backend/raw/RawDevice.cpp

src/logid/Configuration.cpp

@@ -86,7 +86,7 @@ Configuration::DeviceNotFound::DeviceNotFound(std::string name) :
 {
 }
 
-const char * Configuration::DeviceNotFound::what()
+const char * Configuration::DeviceNotFound::what() const noexcept
 {
     return _name.c_str();
 }

src/logid/Configuration.h

@@ -37,7 +37,7 @@ namespace logid
         {
         public:
             explicit DeviceNotFound(std::string name);
-            virtual const char* what();
+            const char* what() const noexcept override;
         private:
             std::string _name;
         };

src/logid/Device.cpp

@@ -20,6 +20,7 @@
 #include "features/DPI.h"
 #include "Device.h"
 #include "features/SmartShift.h"
+#include "features/RemapButton.h"
 
 using namespace logid;
 using namespace logid::backend;
@@ -46,9 +47,14 @@ void Device::_init()
 
     _addFeature<features::DPI>("dpi");
     _addFeature<features::SmartShift>("smartshift");
+    _addFeature<features::RemapButton>("remapbutton");
 
-    for(auto& feature: _features)
+    for(auto& feature: _features) {
         feature.second->configure();
+        feature.second->listen();
+    }
+
+    _hidpp20.listen();
 }
 
 std::string Device::name()
@@ -69,6 +75,9 @@ void Device::sleep()
 void Device::wakeup()
 {
     logPrintf(INFO, "%s:%d woke up.", _path.c_str(), _index);
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    for(auto& feature: _features)
+        feature.second->configure();
 }
 
 DeviceConfig& Device::config()

src/logid/InputDevice.cpp

@@ -16,19 +16,35 @@
  *
  */
 
-#include <libevdev/libevdev.h>
-#include <libevdev/libevdev-uinput.h>
 #include <system_error>
+#include <utility>
+
+#include "InputDevice.h"
 
-#include "EvdevDevice.h"
+extern "C"
+{
+#include <libevdev/libevdev.h>
+#include <libevdev/libevdev-uinput.h>
+};
 
 using namespace logid;
 
-EvdevDevice::EvdevDevice(const char* name)
+InputDevice::InvalidEventCode::InvalidEventCode(std::string name)
+{
+    _what = "Invalid event code " + name;
+}
+
+const char* InputDevice::InvalidEventCode::what() const noexcept
+{
+    return _what.c_str();
+}
+
+InputDevice::InputDevice(const char* name)
 {
     device = libevdev_new();
     libevdev_set_name(device, name);
 
+    ///TODO: Is it really a good idea to enable all events?
     libevdev_enable_event_type(device, EV_KEY);
     for(int i = 0; i < KEY_CNT; i++)
         libevdev_enable_event_code(device, EV_KEY, i, nullptr);
@@ -36,26 +52,56 @@ EvdevDevice::EvdevDevice(const char* name)
     for(int i = 0; i < REL_CNT; i++)
         libevdev_enable_event_code(device, EV_REL, i, nullptr);
 
-    int err = libevdev_uinput_create_from_device(device, LIBEVDEV_UINPUT_OPEN_MANAGED, &ui_device);
+    int err = libevdev_uinput_create_from_device(device,
+            LIBEVDEV_UINPUT_OPEN_MANAGED, &ui_device);
 
     if(err != 0)
         throw std::system_error(-err, std::generic_category());
 }
 
-void EvdevDevice::moveAxis(unsigned int axis, int movement)
+InputDevice::~InputDevice()
 {
-    libevdev_uinput_write_event(ui_device, EV_REL, axis, movement);
-    libevdev_uinput_write_event(ui_device, EV_SYN, SYN_REPORT, 0);
+    libevdev_uinput_destroy(ui_device);
+    libevdev_free(device);
 }
 
-void EvdevDevice::sendEvent(unsigned int type, unsigned int code, int value)
+void InputDevice::moveAxis(uint axis, int movement)
 {
-    libevdev_uinput_write_event(ui_device, type, code, value);
-    libevdev_uinput_write_event(ui_device, EV_SYN, SYN_REPORT, 0);
+    _sendEvent(EV_REL, axis, movement);
 }
 
-EvdevDevice::~EvdevDevice()
+void InputDevice::pressKey(uint code)
 {
-    libevdev_uinput_destroy(ui_device);
-    libevdev_free(device);
+    _sendEvent(EV_KEY, code, 1);
 }
+
+void InputDevice::releaseKey(uint code)
+{
+    _sendEvent(EV_KEY, code, 0);
+}
+
+uint InputDevice::toKeyCode(std::string name)
+{
+    return _toEventCode(EV_KEY, std::move(name));
+}
+
+uint InputDevice::toAxisCode(std::string name)
+{
+    return _toEventCode(EV_KEY, std::move(name));
+}
+
+uint InputDevice::_toEventCode(uint type, const std::string& name)
+{
+    int code = libevdev_event_code_from_name(type, name.c_str());
+
+    if(code == -1)
+        throw InvalidEventCode(name);
+
+    return code;
+}
+
+void InputDevice::_sendEvent(uint type, uint code, int value)
+{
+    libevdev_uinput_write_event(ui_device, type, code, value);
+    libevdev_uinput_write_event(ui_device, EV_SYN, SYN_REPORT, 0);
+}

src/logid/InputDevice.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef LOGID_INPUTDEVICE_H
+#define LOGID_INPUTDEVICE_H
+
+#include <memory>
+
+extern "C"
+{
+#include <libevdev/libevdev.h>
+#include <libevdev/libevdev-uinput.h>
+};
+
+namespace logid
+{
+    typedef uint keycode;
+
+    class InputDevice
+    {
+    public:
+        class InvalidEventCode : public std::exception
+        {
+        public:
+            explicit InvalidEventCode(std::string name);
+            const char* what() const noexcept override;
+        private:
+            std::string _what;
+        };
+        explicit InputDevice(const char *name);
+        ~InputDevice();
+
+        void moveAxis(uint axis, int movement);
+        void pressKey(uint code);
+        void releaseKey(uint code);
+
+        static uint toKeyCode(std::string name);
+        static uint toAxisCode(std::string name);
+    private:
+        void _sendEvent(uint type, uint code, int value);
+
+        static uint _toEventCode(uint type, const std::string& name);
+
+        libevdev* device;
+        libevdev_uinput* ui_device;
+    };
+
+    extern std::unique_ptr<InputDevice> virtual_input;
+}
+
+#endif //LOGID_INPUTDEVICE_H

src/logid/actions/Action.cpp

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <algorithm>
+#include "Action.h"
+#include "../util/log.h"
+#include "KeypressAction.h"
+
+using namespace logid;
+using namespace logid::actions;
+
+std::shared_ptr<Action> Action::makeAction(Device *device, libconfig::Setting
+    &setting)
+{
+    if(!setting.isGroup()) {
+        logPrintf(WARN, "Line %d: Action is not a group, ignoring.",
+                setting.getSourceLine());
+        throw InvalidAction();
+    }
+
+    try {
+        auto& action_type = setting.lookup("type");
+
+        if(action_type.getType() != libconfig::Setting::TypeString) {
+            logPrintf(WARN, "Line %d: Action type must be a string",
+                    action_type.getSourceLine());
+            throw InvalidAction();
+        }
+
+        std::string type = action_type;
+        std::transform(type.begin(), type.end(), type.begin(), ::tolower);
+
+        if(type == "keypress")
+            return std::make_shared<KeypressAction>(device, setting);
+        else
+            throw InvalidAction(type);
+
+    } catch(libconfig::SettingNotFoundException& e) {
+        logPrintf(WARN, "Line %d: Action type is missing, ignoring.",
+                setting.getSourceLine());
+        throw InvalidAction();
+    }
+}

src/logid/actions/Action.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifndef LOGID_ACTION_H
+#define LOGID_ACTION_H
+
+#include <atomic>
+#include <libconfig.h++>
+#include <memory>
+
+namespace logid {
+    class Device;
+namespace actions {
+    class InvalidAction : public std::exception
+    {
+    public:
+        InvalidAction()
+        {
+        }
+        explicit InvalidAction(std::string& action) : _action (action)
+        {
+        }
+        const char* what() const noexcept override
+        {
+            return _action.c_str();
+        }
+    private:
+        std::string _action;
+    };
+
+    class Action
+    {
+    public:
+        static std::shared_ptr<Action> makeAction(Device* device,
+                libconfig::Setting& setting);
+
+        virtual void press() = 0;
+        virtual void release() = 0;
+        virtual void move(int16_t x, int16_t y)
+        {
+        }
+
+        virtual bool pressed()
+        {
+            return _pressed;
+        }
+
+        virtual uint8_t reprogFlags() const = 0;
+
+        class Config
+        {
+        public:
+            explicit Config(Device* device) : _device (device)
+            {
+            }
+        protected:
+            Device* _device;
+        };
+    protected:
+        explicit Action(Device* device) : _device (device), _pressed (false)
+        {
+        }
+        Device* _device;
+        std::atomic<bool> _pressed;
+    };
+}}
+
+#endif //LOGID_ACTION_H

src/logid/actions/KeypressAction.cpp

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include "KeypressAction.h"
+#include "../util/log.h"
+#include "../InputDevice.h"
+#include "../backend/hidpp20/features/ReprogControls.h"
+
+using namespace logid::actions;
+using namespace logid::backend;
+
+KeypressAction::KeypressAction(Device *device, libconfig::Setting& config) :
+    Action(device), _config (device, config)
+{
+}
+
+void KeypressAction::press()
+{
+    for(auto& key : _config.keys())
+        virtual_input->pressKey(key);
+}
+
+void KeypressAction::release()
+{
+    for(auto& key : _config.keys())
+        virtual_input->releaseKey(key);
+}
+
+uint8_t KeypressAction::reprogFlags() const
+{
+    return hidpp20::ReprogControls::TemporaryDiverted;
+}
+
+KeypressAction::Config::Config(Device* device, libconfig::Setting& config) :
+    Action::Config(device)
+{
+    if(!config.isGroup()) {
+        logPrintf(WARN, "Line %d: action must be an object, skipping.",
+                config.getSourceLine());
+        return;
+    }
+
+    try {
+        auto &keys = config.lookup("keys");
+        if(keys.isArray() || keys.isList()) {
+            int key_count = keys.getLength();
+            for(int i = 0; i < key_count; i++) {
+                auto& key = keys[i];
+                if(key.isNumber()) {
+                    _keys.push_back(key);
+                } else if(key.getType() == libconfig::Setting::TypeString) {
+                    try {
+                        _keys.push_back(virtual_input->toKeyCode(key));
+                    } catch(InputDevice::InvalidEventCode& e) {
+                        logPrintf(WARN, "Line %d: Invalid keycode %s, skipping."
+                            , key.getSourceLine(), key.c_str());
+                    }
+                } else {
+                    logPrintf(WARN, "Line %d: keycode must be string or int",
+                            key.getSourceLine(), key.c_str());
+                }
+            }
+        }
+    } catch (libconfig::SettingNotFoundException& e) {
+        logPrintf(WARN, "Line %d: keys is a required field, skipping.",
+                config.getSourceLine());
+    }
+}
+
+std::vector<uint>& KeypressAction::Config::keys()
+{
+    return _keys;
+}

src/logid/actions/KeypressAction.h

@@ -15,31 +15,36 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#ifndef LOGID_ACTION_KEYPRESS_H
+#define LOGID_ACTION_KEYPRESS_H
 
-#ifndef LOGID_EVDEVDEVICE_H
-#define LOGID_EVDEVDEVICE_H
+#include <vector>
+#include <libconfig.h++>
+#include "Action.h"
 
-#include <libevdev/libevdev.h>
-#include <libevdev/libevdev-uinput.h>
-
-namespace logid
-{
-    class EvdevDevice
+namespace logid {
+namespace actions {
+    class KeypressAction : public Action
     {
     public:
-        EvdevDevice(const char *name);
-
-        ~EvdevDevice();
-
-        void moveAxis(unsigned int axis, int movement);
-
-        void sendEvent(unsigned int type, unsigned int code, int value);
-
-        libevdev *device;
-        libevdev_uinput *ui_device;
+        KeypressAction(Device* dev, libconfig::Setting& config);
+
+        virtual void press();
+        virtual void release();
+
+        virtual uint8_t reprogFlags() const;
+
+        class Config : public Action::Config
+        {
+        public:
+            explicit Config(Device* device, libconfig::Setting& root);
+            std::vector<uint>& keys();
+        protected:
+            std::vector<uint> _keys;
+        };
+    protected:
+        Config _config;
     };
+}}
 
-    extern EvdevDevice* global_evdev;
-}
-
-#endif //LOGID_EVDEVDEVICE_H
+#endif //LOGID_ACTION_KEYPRESS_H

src/logid/backend/hidpp/Device.cpp

@@ -92,6 +92,7 @@ std::tuple<uint8_t, uint8_t> Device::version() const
 
 void Device::_init()
 {
+    _listening = false;
     _supported_reports = getSupportedReports(_raw_device->reportDescriptor());
     if(!_supported_reports)
         throw InvalidDevice(InvalidDevice::NoHIDPPReport);
@@ -127,7 +128,8 @@ void Device::_init()
 
 Device::~Device()
 {
-    _raw_device->removeEventHandler("DEV_" + std::to_string(_index));
+    if(_listening)
+        _raw_device->removeEventHandler("DEV_" + std::to_string(_index));
 }
 
 void Device::addEventHandler(const std::string& nickname,
@@ -144,6 +146,12 @@ void Device::removeEventHandler(const std::string& nickname)
     _event_handlers.erase(nickname);
 }
 
+const std::map<std::string, std::shared_ptr<EventHandler>>&
+    Device::eventHandlers()
+{
+    return _event_handlers;
+}
+
 void Device::handleEvent(Report& report)
 {
     for(auto& handler : _event_handlers)
@@ -192,31 +200,33 @@ uint16_t Device::pid() const
 void Device::listen()
 {
     if(!_raw_device->isListening())
-        ///TODO: Kill RawDevice?
         thread::spawn({[raw=this->_raw_device]() {
             raw->listen();
         }});
 
     // Pass all HID++ events with device index to this device.
-    std::shared_ptr<raw::RawEventHandler> handler;
-    handler->condition = [this](std::vector<uint8_t>& report)->bool
-    {
+    auto handler = std::make_shared<raw::RawEventHandler>();
+    handler->condition = [index=this->_index](std::vector<uint8_t>& report)
+            ->bool {
         return (report[Offset::Type] == Report::Type::Short ||
                 report[Offset::Type] == Report::Type::Long) &&
-               (report[Offset::DeviceIndex] == this->_index);
+               (report[Offset::DeviceIndex] == index);
     };
-    handler->callback = [this](std::vector<uint8_t>& report)->void
-    {
+    handler->callback = [this](std::vector<uint8_t>& report)->void {
         Report _report(report);
         this->handleEvent(_report);
     };
 
     _raw_device->addEventHandler("DEV_" + std::to_string(_index), handler);
+    _listening = true;
 }
 
 void Device::stopListening()
 {
-    _raw_device->removeEventHandler("DEV_" + std::to_string(_index));
+    if(_listening)
+        _raw_device->removeEventHandler("DEV_" + std::to_string(_index));
+
+    _listening = false;
 
     if(!_raw_device->eventHandlers().empty())
         _raw_device->stopListener();

src/logid/backend/hidpp/Device.h

@@ -55,7 +55,7 @@ namespace hidpp
                 Asleep
             };
             InvalidDevice(Reason reason) : _reason (reason) {}
-            virtual const char *what() const noexcept;
+            virtual const char* what() const noexcept;
             virtual Reason code() const noexcept;
         private:
             Reason _reason;
@@ -81,6 +81,8 @@ namespace hidpp
         void addEventHandler(const std::string& nickname,
                 const std::shared_ptr<EventHandler>& handler);
         void removeEventHandler(const std::string& nickname);
+        const std::map<std::string, std::shared_ptr<EventHandler>>&
+            eventHandlers();
 
         Report sendReport(Report& report);
 
@@ -98,6 +100,8 @@ namespace hidpp
         uint16_t _pid;
         std::string _name;
 
+        std::atomic<bool> _listening;
+
         std::map<std::string, std::shared_ptr<EventHandler>> _event_handlers;
     };
 } } }

src/logid/backend/hidpp/defs.h

@@ -21,6 +21,8 @@
 
 #define LOGID_HIDPP_SOFTWARE_ID 0
 
+#include <cstdint>
+
 namespace logid {
 namespace backend {
 namespace hidpp

src/logid/backend/hidpp20/Feature.cpp

@@ -63,3 +63,8 @@ Feature::Feature(Device* dev, uint16_t _id) : _device (dev)
             throw UnsupportedFeature(_id);
     }
 }
+
+uint8_t Feature::featureIndex()
+{
+    return _index;
+}

src/logid/backend/hidpp20/Feature.h

@@ -40,7 +40,7 @@ namespace hidpp20 {
     public:
         static const uint16_t ID;
         virtual uint16_t getID() = 0;
-
+        uint8_t featureIndex();
     protected:
         explicit Feature(Device* dev, uint16_t _id);
         std::vector<uint8_t> callFunction(uint8_t function_id,

src/logid/backend/hidpp20/features/ReprogControls.cpp

@@ -16,6 +16,7 @@
  *
  */
 #include <cassert>
+#include "../Error.h"
 #include "ReprogControls.h"
 
 using namespace logid::backend::hidpp20;
@@ -30,7 +31,7 @@ x::x(Device* dev, uint16_t _id) : base(dev, _id) \
 
 #define MAKE_REPROG(x, dev) \
 try { \
-    return x(dev); \
+    return std::make_shared<x>(dev); \
 } catch(UnsupportedFeature &e) {\
 }
 
@@ -41,7 +42,7 @@ DEFINE_REPROG(ReprogControlsV2_2, ReprogControlsV2);
 DEFINE_REPROG(ReprogControlsV3, ReprogControlsV2_2);
 DEFINE_REPROG(ReprogControlsV4, ReprogControlsV3);
 
-ReprogControls ReprogControls::autoVersion(Device *dev)
+std::shared_ptr<ReprogControls> ReprogControls::autoVersion(Device *dev)
 {
     MAKE_REPROG(ReprogControlsV4, dev);
     MAKE_REPROG(ReprogControlsV3, dev);
@@ -49,7 +50,7 @@ ReprogControls ReprogControls::autoVersion(Device *dev)
     MAKE_REPROG(ReprogControlsV2, dev);
 
     // If base version cannot be made, throw error
-    return ReprogControls(dev);
+    return std::make_shared<ReprogControls>(dev);
 }
 
 uint8_t ReprogControls::getControlCount()
@@ -78,29 +79,43 @@ ReprogControls::ControlInfo ReprogControls::getControlInfo(uint8_t index)
     return info;
 }
 
+ReprogControls::ControlInfo ReprogControls::getControlIdInfo(uint16_t cid)
+{
+    if(_cids.empty()) {
+        for(uint8_t i = 0; i < getControlCount(); i++) {
+            auto info = getControlInfo(i);
+            _cids.emplace(info.controlID, info);
+        }
+    }
+
+    auto it = _cids.find(cid);
+    if(it == _cids.end())
+        throw Error(Error::InvalidArgument);
+    else
+        return it->second;
+}
+
 ReprogControls::ControlInfo ReprogControls::getControlReporting(uint16_t cid)
 {
-    std::vector<uint8_t> params(2);
-    ControlInfo info{};
-    params[0] = (cid >> 8) & 0xff;
-    params[1] = cid & 0xff;
-    auto response = callFunction(GetControlReporting, params);
+    // Emulate this function, only Reprog controls v4 supports this
+    auto info = getControlIdInfo(cid);
 
-    info.controlID = response[1];
-    info.controlID |= response[0] << 8;
-    info.flags = response[2];
-    return info;
+    ControlInfo report{};
+    report.controlID = cid;
+    report.flags = 0;
+    if(info.flags & TemporaryDivertable)
+        report.flags |= TemporaryDiverted;
+    if(info.flags & PersisentlyDivertable)
+        report.flags |= PersistentlyDiverted;
+    if(info.additionalFlags & RawXY)
+        report.flags |= RawXYDiverted;
+
+    return report;
 }
 
 void ReprogControls::setControlReporting(uint8_t cid, ControlInfo info)
 {
-    std::vector<uint8_t> params(5);
-    params[0] = (cid >> 8) & 0xff;
-    params[1] = cid & 0xff;
-    params[2] = info.flags;
-    params[3] = (info.controlID >> 8) & 0xff;
-    params[4] = info.controlID & 0xff;
-    callFunction(SetControlReporting, params);
+    // This function does not exist pre-v4 and cannot be emulated, ignore.
 }
 
 std::set<uint16_t> ReprogControls::divertedButtonEvent(
@@ -131,3 +146,28 @@ ReprogControls::Move ReprogControls::divertedRawXYEvent(const hidpp::Report
     move.y |= report.paramBegin()[2] << 8;
     return move;
 }
+
+ReprogControls::ControlInfo ReprogControlsV4::getControlReporting(uint16_t cid)
+{
+    std::vector<uint8_t> params(2);
+    ControlInfo info{};
+    params[0] = (cid >> 8) & 0xff;
+    params[1] = cid & 0xff;
+    auto response = callFunction(GetControlReporting, params);
+
+    info.controlID = response[1];
+    info.controlID |= response[0] << 8;
+    info.flags = response[2];
+    return info;
+}
+
+void ReprogControlsV4::setControlReporting(uint8_t cid, ControlInfo info)
+{
+    std::vector<uint8_t> params(5);
+    params[0] = (cid >> 8) & 0xff;
+    params[1] = cid & 0xff;
+    params[2] = info.flags;
+    params[3] = (info.controlID >> 8) & 0xff;
+    params[4] = info.controlID & 0xff;
+    callFunction(SetControlReporting, params);
+}

src/logid/backend/hidpp20/features/ReprogControls.h

@@ -18,6 +18,8 @@
 #ifndef LOGID_BACKEND_HIDPP20_FEATURE_REPROGCONTROLS_H
 #define LOGID_BACKEND_HIDPP20_FEATURE_REPROGCONTROLS_H
 
+#include <map>
+
 #include "../feature_defs.h"
 #include "../Feature.h"
 
@@ -28,27 +30,17 @@ namespace hidpp20
     class ReprogControls : public Feature
     {
     public:
-        static const uint16_t ID = FeatureID::REPROG_CONTROLS;
-        virtual uint16_t getID() { return ID; }
-
-        virtual bool supportsRawXY() { return false; }
-
         enum Function {
             GetControlCount = 0,
             GetControlInfo = 1,
             GetControlReporting = 2,
             SetControlReporting = 3
         };
-
         enum Event {
             DivertedButtonEvent = 0,
             DivertedRawXYEvent = 1
         };
 
-        explicit ReprogControls(Device* dev);
-
-        virtual uint8_t getControlCount();
-
         struct ControlInfo
         {
             uint16_t controlID;
@@ -68,24 +60,41 @@ namespace hidpp20
             FnToggle = 1<<3,
             ReprogHint = 1<<4,
             TemporaryDivertable = 1<<5,
-            PerisentlyDiverable = 1<<6,
+            PersisentlyDivertable = 1<<6,
             Virtual = 1<<7
         };
         enum ControlInfoAdditionalFlags: uint8_t {
             RawXY = 1<<0
         };
 
-        virtual ControlInfo getControlInfo(uint8_t index);
-
         enum ControlReportingFlags: uint8_t {
             TemporaryDiverted = 1<<0,
             ChangeTemporaryDivert = 1<<1,
-            PersistentDiverted = 1<<2,
+            PersistentlyDiverted = 1<<2,
             ChangePersistentDivert = 1<<3,
             RawXYDiverted = 1<<4,
             ChangeRawXYDivert = 1<<5
         };
 
+        struct Move
+        {
+            int16_t x;
+            int16_t y;
+        };
+
+        static const uint16_t ID = FeatureID::REPROG_CONTROLS;
+        virtual uint16_t getID() { return ID; }
+
+        virtual bool supportsRawXY() { return false; }
+
+        explicit ReprogControls(Device* dev);
+
+        virtual uint8_t getControlCount();
+
+        virtual ControlInfo getControlInfo(uint8_t cid);
+
+        virtual ControlInfo getControlIdInfo(uint16_t cid);
+
         // Onlu controlId and flags will be set
         virtual ControlInfo getControlReporting(uint16_t cid);
 
@@ -95,24 +104,19 @@ namespace hidpp20
         static std::set<uint16_t> divertedButtonEvent(const hidpp::Report&
             report);
 
-        struct Move
-        {
-            int16_t x;
-            int16_t y;
-        };
-
         static Move divertedRawXYEvent(const hidpp::Report& report);
 
-        static ReprogControls autoVersion(Device *dev);
+        static std::shared_ptr<ReprogControls> autoVersion(Device *dev);
     protected:
         ReprogControls(Device* dev, uint16_t _id);
+        std::map<uint16_t, ControlInfo> _cids;
     };
 
     class ReprogControlsV2 : public ReprogControls
     {
     public:
         static const uint16_t ID = FeatureID::REPROG_CONTROLS_V2;
-        uint16_t getID() override { return ID; }
+        virtual uint16_t getID() { return ID; }
 
         explicit ReprogControlsV2(Device* dev);
     protected:
@@ -123,7 +127,7 @@ namespace hidpp20
     {
     public:
         static const uint16_t ID = FeatureID::REPROG_CONTROLS_V2_2;
-        uint16_t getID() override { return ID; }
+        virtual uint16_t getID() { return ID; }
 
         explicit ReprogControlsV2_2(Device* dev);
     protected:
@@ -134,7 +138,7 @@ namespace hidpp20
     {
     public:
         static const uint16_t ID = FeatureID::REPROG_CONTROLS_V3;
-        uint16_t getID() override { return ID; }
+        virtual uint16_t getID() { return ID; }
 
         explicit ReprogControlsV3(Device* dev);
     protected:
@@ -145,10 +149,14 @@ namespace hidpp20
     {
     public:
         static const uint16_t ID = FeatureID::REPROG_CONTROLS_V4;
-        uint16_t getID() override { return ID; }
+        virtual uint16_t getID() { return ID; }
 
         bool supportsRawXY() override { return true; }
 
+        ControlInfo getControlReporting(uint16_t cid) override;
+
+        void setControlReporting(uint8_t cid, ControlInfo info) override;
+
         explicit ReprogControlsV4(Device* dev);
     protected:
         ReprogControlsV4(Device* dev, uint16_t _id);

src/logid/backend/raw/RawDevice.cpp

@@ -354,6 +354,7 @@ void RawDevice::addEventHandler(const std::string& nickname,
 {
     auto it = _event_handlers.find(nickname);
     assert(it == _event_handlers.end());
+    assert(handler);
     _event_handlers.emplace(nickname, handler);
 }
 

src/logid/features/RemapButton.cpp

@@ -0,0 +1,180 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include <sstream>
+#include "../Device.h"
+#include "RemapButton.h"
+#include "../backend/hidpp20/Error.h"
+
+using namespace logid::features;
+using namespace logid::backend;
+using namespace logid::actions;
+
+#define HIDPP20_REPROG_REBIND (hidpp20::ReprogControls::ChangeTemporaryDivert \
+| hidpp20::ReprogControls::ChangeRawXYDivert)
+
+#define EVENTHANDLER_NAME "REMAP_BUTTON"
+
+RemapButton::RemapButton(Device *dev): DeviceFeature(dev), _config (dev),
+    _reprog_controls (hidpp20::ReprogControls::autoVersion(&dev->hidpp20()))
+{
+}
+
+RemapButton::~RemapButton()
+{
+    _device->hidpp20().removeEventHandler(EVENTHANDLER_NAME);
+}
+
+void RemapButton::configure()
+{
+    ///TODO: DJ reporting trickery if cannot be remapped
+    for(auto& i : _config.buttons()) {
+        hidpp20::ReprogControls::ControlInfo info{};
+        try {
+            info = _reprog_controls->getControlIdInfo(i.first);
+        } catch(hidpp20::Error& e) {
+            if(e.code() == hidpp20::Error::InvalidArgument) {
+                logPrintf(WARN, "%s: CID 0x%02x does not exist.",
+                        _device->name().c_str(), i.first);
+                continue;
+            }
+            throw e;
+        }
+
+        if((i.second->reprogFlags() & hidpp20::ReprogControls::RawXYDiverted) &&
+                (!_reprog_controls->supportsRawXY() || (info.additionalFlags &
+                hidpp20::ReprogControls::RawXY)))
+            logPrintf(WARN, "%s: Cannot divert raw XY movements for CID "
+                            "0x%02x", _device->name().c_str(), i.first);
+
+        hidpp20::ReprogControls::ControlInfo report{};
+        report.controlID = i.first;
+        report.flags = HIDPP20_REPROG_REBIND;
+        report.flags |= i.second->reprogFlags();
+        _reprog_controls->setControlReporting(i.first, report);
+    }
+}
+
+void RemapButton::listen()
+{
+    if(_device->hidpp20().eventHandlers().find(EVENTHANDLER_NAME) ==
+       _device->hidpp20().eventHandlers().end()) {
+        auto handler = std::make_shared<hidpp::EventHandler>();
+        handler->condition = [index=_reprog_controls->featureIndex()]
+                                      (hidpp::Report& report)->bool {
+            return (report.feature() == index) && ((report.function() ==
+                hidpp20::ReprogControls::DivertedButtonEvent) || (report
+                .function() == hidpp20::ReprogControls::DivertedRawXYEvent));
+        };
+
+        handler->callback = [this](hidpp::Report& report)->void {
+            if(report.function() ==
+                hidpp20::ReprogControls::DivertedButtonEvent)
+                this->_buttonEvent(_reprog_controls->divertedButtonEvent(
+                        report));
+            else { // RawXY
+                auto divertedXY = _reprog_controls->divertedRawXYEvent(report);
+                for(auto& button : this->_config.buttons())
+                    if(button.second->pressed())
+                        button.second->move(divertedXY.x, divertedXY.y);
+            }
+        };
+
+        _device->hidpp20().addEventHandler(EVENTHANDLER_NAME, handler);
+    };
+}
+
+void RemapButton::_buttonEvent(std::set<uint16_t> new_state)
+{
+    // Ensure I/O doesn't occur while updating button state
+    std::lock_guard<std::mutex> lock(_button_lock);
+
+    // Press all added buttons
+    for(auto& i : new_state) {
+        auto old_i = _pressed_buttons.find(i);
+        if(old_i != _pressed_buttons.end()) {
+            _pressed_buttons.erase(old_i);
+        } else {
+            auto action = _config.buttons().find(i);
+            if(action != _config.buttons().end())
+                action->second->press();
+        }
+    }
+
+    // Release all removed buttons
+    for(auto& i : _pressed_buttons) {
+        auto action = _config.buttons().find(i);
+        if(action != _config.buttons().end())
+            action->second->release();
+    }
+
+    _pressed_buttons = new_state;
+}
+
+RemapButton::Config::Config(Device *dev) : DeviceFeature::Config(dev)
+{
+    try {
+        auto& config_root = dev->config().getSetting("buttons");
+        if(!config_root.isList()) {
+            logPrintf(WARN, "Line %d: buttons must be a list.",
+                    config_root.getSourceLine());
+            return;
+        }
+        int button_count = config_root.getLength();
+        for(int i = 0; i < button_count; i++)
+            _parseButton(config_root[i]);
+    } catch(libconfig::SettingNotFoundException& e) {
+        // buttons not configured, use default
+    }
+}
+
+void RemapButton::Config::_parseButton(libconfig::Setting &setting)
+{
+    if(!setting.isGroup()) {
+        logPrintf(WARN, "Line %d: button must be an object, ignoring.",
+                setting.getSourceLine());
+        return;
+    }
+
+    uint16_t cid;
+    try {
+        auto& cid_setting = setting.lookup("cid");
+        if(!cid_setting.isNumber()) {
+            logPrintf(WARN, "Line %d: cid must be a number, ignoring.",
+                    cid_setting.getSourceLine());
+            return;
+        }
+        cid = (int)cid_setting;
+    } catch(libconfig::SettingNotFoundException& e) {
+        logPrintf(WARN, "Line %d: cid is required, ignoring.",
+                  setting.getSourceLine());
+        return;
+    }
+
+    try {
+        _buttons.emplace(cid, Action::makeAction(_device,
+                setting.lookup("action")));
+    } catch(libconfig::SettingNotFoundException& e) {
+        logPrintf(WARN, "Line %d: action is required, ignoring.",
+                  setting.getSourceLine());
+    }
+}
+
+const std::map<uint8_t, std::shared_ptr<Action>>& RemapButton::Config::buttons()
+{
+    return _buttons;
+}

src/logid/features/RemapButton.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2019-2020 PixlOne
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifndef LOGID_FEATURE_REMAPBUTTON_H
+#define LOGID_FEATURE_REMAPBUTTON_H
+
+#include "../backend/hidpp20/features/ReprogControls.h"
+#include "DeviceFeature.h"
+#include "../actions/Action.h"
+
+namespace logid {
+namespace features
+{
+    class RemapButton : public DeviceFeature
+    {
+    public:
+        explicit RemapButton(Device* dev);
+        ~RemapButton();
+        virtual void configure();
+        virtual void listen();
+
+        class Config : public DeviceFeature::Config
+        {
+        public:
+            explicit Config(Device* dev);
+            const std::map<uint8_t, std::shared_ptr<actions::Action>>&
+                buttons();
+        protected:
+            void _parseButton(libconfig::Setting& setting);
+            std::map<uint8_t, std::shared_ptr<actions::Action>> _buttons;
+        };
+    private:
+        void _buttonEvent(std::set<uint16_t> new_state);
+        Config _config;
+        std::shared_ptr<backend::hidpp20::ReprogControls> _reprog_controls;
+        std::set<uint16_t> _pressed_buttons;
+        std::mutex _button_lock;
+    };
+}}
+
+#endif //LOGID_FEATURE_REMAPBUTTON_H

src/logid/logid.cpp

@@ -24,8 +24,9 @@
 #include "util/log.h"
 #include "DeviceManager.h"
 #include "logid.h"
+#include "InputDevice.h"
 
-#define evdev_name "logid"
+#define LOGID_VIRTUAL_INPUT_NAME "LogiOps Virtual Input"
 #define DEFAULT_CONFIG_FILE "/etc/logid.cfg"
 
 #ifndef LOGIOPS_VERSION
@@ -40,6 +41,7 @@ std::string config_file = DEFAULT_CONFIG_FILE;
 LogLevel logid::global_loglevel = INFO;
 std::shared_ptr<Configuration> logid::global_config;
 std::unique_ptr<DeviceManager> logid::device_manager;
+std::unique_ptr<InputDevice> logid::virtual_input;
 
 bool logid::kill_logid = false;
 std::mutex logid::device_manager_reload;
@@ -163,17 +165,14 @@ int main(int argc, char** argv)
         global_config = std::make_shared<Configuration>();
     }
 
-    /*
-    //Create an evdev device called 'logid'
-    try { global_evdev = new EvdevDevice(evdev_name); }
-    catch(std::system_error& e)
-    {
-        log_printf(ERROR, "Could not create evdev device: %s", e.what());
+    //Create a virtual input device
+    try {
+        virtual_input = std::make_unique<InputDevice>(LOGID_VIRTUAL_INPUT_NAME);
+    } catch(std::system_error& e) {
+        logPrintf(ERROR, "Could not create input device: %s", e.what());
         return EXIT_FAILURE;
     }
 
-    */
-    
     // Scan devices, create listeners, handlers, etc.
     device_manager = std::make_unique<DeviceManager>();