Add DeviceStatus device feature

Should fix bug #66.

src/logid/CMakeLists.txt

@@ -20,6 +20,7 @@ add_executable(logid
         features/SmartShift.cpp
         features/HiresScroll.cpp
         features/RemapButton.cpp
+        features/DeviceStatus.cpp
         actions/Action.cpp
         actions/NullAction.cpp
         actions/KeypressAction.cpp

src/logid/Device.cpp

@@ -23,6 +23,7 @@
 #include "features/RemapButton.h"
 #include "backend/hidpp20/features/Reset.h"
 #include "features/HiresScroll.h"
+#include "features/DeviceStatus.h"
 
 using namespace logid;
 using namespace logid::backend;
@@ -51,6 +52,7 @@ void Device::_init()
     _addFeature<features::SmartShift>("smartshift");
     _addFeature<features::HiresScroll>("hiresscroll");
     _addFeature<features::RemapButton>("remapbutton");
+    _addFeature<features::DeviceStatus>("devicestatus");
 
     _makeResetMechanism();
     reset();

src/logid/features/DeviceStatus.cpp

@@ -0,0 +1,62 @@
+/*
+ * 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 "DeviceStatus.h"
+#include "../util/task.h"
+
+#define EVENTHANDLER_NAME "devicestatus"
+
+using namespace logid::features;
+using namespace logid::backend;
+
+DeviceStatus::DeviceStatus(logid::Device *dev) : DeviceFeature(dev)
+{
+    try {
+        _wireless_device_status =std::make_shared<
+                hidpp20::WirelessDeviceStatus>(&dev->hidpp20());
+    } catch(hidpp20::UnsupportedFeature& e) {
+        throw UnsupportedFeature();
+    }
+}
+
+void DeviceStatus::configure()
+{
+    // Do nothing
+}
+
+void DeviceStatus::listen()
+{
+    if(_device->hidpp20().eventHandlers().find(EVENTHANDLER_NAME) ==
+       _device->hidpp20().eventHandlers().end()) {
+        auto handler = std::make_shared<hidpp::EventHandler>();
+        handler->condition = [index=_wireless_device_status->featureIndex()](
+                const hidpp::Report& report)->bool {
+            return report.feature() == index && report.function() ==
+                hidpp20::WirelessDeviceStatus::StatusBroadcast;
+        };
+
+        handler->callback = [dev=this->_device](
+                const hidpp::Report& report)->void {
+            auto event = hidpp20::WirelessDeviceStatus::statusBroadcastEvent(
+                    report);
+            if(event.reconfNeeded)
+                task::spawn([dev](){ dev->wakeup(); });
+        };
+
+        _device->hidpp20().addEventHandler(EVENTHANDLER_NAME, handler);
+    }
+}

src/logid/features/DeviceStatus.h

@@ -0,0 +1,41 @@
+/*
+ * 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_DEVICESTATUS_H
+#define LOGID_FEATURE_DEVICESTATUS_H
+
+
+#include "DeviceFeature.h"
+#include "../Device.h"
+#include "../backend/hidpp20/features/WirelessDeviceStatus.h"
+
+namespace logid {
+namespace features
+{
+    class DeviceStatus : public DeviceFeature
+    {
+    public:
+        explicit DeviceStatus(Device* dev);
+        virtual void configure();
+        virtual void listen();
+    private:
+        std::shared_ptr<backend::hidpp20::WirelessDeviceStatus>
+                _wireless_device_status;
+    };
+}}
+
+#endif //LOGID_FEATURE_DEVICESTATUS_H