input_common: Rewrite keyboard

src/input_common/drivers/keyboard.cpp

@@ -0,0 +1,35 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#include "common/param_package.h"
+#include "input_common/drivers/keyboard.h"
+
+namespace InputCommon {
+
+Keyboard::Keyboard(const std::string& input_engine_) : InputEngine(input_engine_) {
+    PreSetController(identifier);
+}
+
+void Keyboard::PressKey(int key_code) {
+    SetButton(identifier, key_code, true);
+}
+
+void Keyboard::ReleaseKey(int key_code) {
+    SetButton(identifier, key_code, false);
+}
+
+void Keyboard::ReleaseAllKeys() {
+    ResetButtonState();
+}
+
+std::vector<Common::ParamPackage> Keyboard::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    devices.emplace_back(Common::ParamPackage{
+        {"engine", "keyboard"},
+        {"display", "Keyboard Only"},
+    });
+    return devices;
+}
+
+} // namespace InputCommon