1 files changed, 112 insertions, 0 deletions

diff --git a/src/input_common/drivers/keyboard.cpp b/src/input_common/drivers/keyboard.cpp
new file mode 100644
index 000000000..23b0c0ccf
--- /dev/null
+++ b/src/input_common/drivers/keyboard.cpp
@@ -0,0 +1,112 @@
+// 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 "common/settings_input.h"
+#include "input_common/drivers/keyboard.h"
+
+namespace InputCommon {
+
+constexpr PadIdentifier key_identifier = {
+    .guid = Common::UUID{Common::INVALID_UUID},
+    .port = 0,
+    .pad = 0,
+};
+constexpr PadIdentifier keyboard_key_identifier = {
+    .guid = Common::UUID{Common::INVALID_UUID},
+    .port = 1,
+    .pad = 0,
+};
+constexpr PadIdentifier keyboard_modifier_identifier = {
+    .guid = Common::UUID{Common::INVALID_UUID},
+    .port = 1,
+    .pad = 1,
+};
+
+Keyboard::Keyboard(const std::string& input_engine_) : InputEngine(input_engine_) {
+    // Keyboard is broken into 3 diferent sets:
+    // key: Unfiltered intended for controllers.
+    // keyboard_key: Allows only Settings::NativeKeyboard::Keys intended for keyboard emulation.
+    // keyboard_modifier: Allows only Settings::NativeKeyboard::Modifiers intended for keyboard
+    // emulation.
+    PreSetController(key_identifier);
+    PreSetController(keyboard_key_identifier);
+    PreSetController(keyboard_modifier_identifier);
+}
+
+void Keyboard::PressKey(int key_code) {
+    SetButton(key_identifier, key_code, true);
+}
+
+void Keyboard::ReleaseKey(int key_code) {
+    SetButton(key_identifier, key_code, false);
+}
+
+void Keyboard::PressKeyboardKey(int key_index) {
+    if (key_index == Settings::NativeKeyboard::None) {
+        return;
+    }
+    SetButton(keyboard_key_identifier, key_index, true);
+}
+
+void Keyboard::ReleaseKeyboardKey(int key_index) {
+    if (key_index == Settings::NativeKeyboard::None) {
+        return;
+    }
+    SetButton(keyboard_key_identifier, key_index, false);
+}
+
+void Keyboard::SetKeyboardModifiers(int key_modifiers) {
+    for (int i = 0; i < 32; ++i) {
+        bool key_value = ((key_modifiers >> i) & 0x1) != 0;
+        SetButton(keyboard_modifier_identifier, i, key_value);
+        // Use the modifier to press the key button equivalent
+        switch (i) {
+        case Settings::NativeKeyboard::LeftControl:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftControlKey, key_value);
+            break;
+        case Settings::NativeKeyboard::LeftShift:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftShiftKey, key_value);
+            break;
+        case Settings::NativeKeyboard::LeftAlt:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftAltKey, key_value);
+            break;
+        case Settings::NativeKeyboard::LeftMeta:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftMetaKey, key_value);
+            break;
+        case Settings::NativeKeyboard::RightControl:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightControlKey,
+                      key_value);
+            break;
+        case Settings::NativeKeyboard::RightShift:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightShiftKey, key_value);
+            break;
+        case Settings::NativeKeyboard::RightAlt:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightAltKey, key_value);
+            break;
+        case Settings::NativeKeyboard::RightMeta:
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightMetaKey, key_value);
+            break;
+        default:
+            // Other modifier keys should be pressed with PressKey since they stay enabled until
+            // next press
+            break;
+        }
+    }
+}
+
+void Keyboard::ReleaseAllKeys() {
+    ResetButtonState();
+}
+
+std::vector<Common::ParamPackage> Keyboard::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    devices.emplace_back(Common::ParamPackage{
+        {"engine", GetEngineName()},
+        {"display", "Keyboard Only"},
+    });
+    return devices;
+}
+
+} // namespace InputCommon