input_common: Allow keyboard to be backwards compatible

src/input_common/drivers/keyboard.cpp

@@ -13,15 +13,26 @@ constexpr PadIdentifier key_identifier = {
     .port = 0,
     .pad = 0,
 };
-constexpr PadIdentifier modifier_identifier = {
+constexpr PadIdentifier keyboard_key_identifier = {
     .guid = Common::UUID{Common::INVALID_UUID},
-    .port = 0,
+    .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(modifier_identifier);
+    PreSetController(keyboard_key_identifier);
+    PreSetController(keyboard_modifier_identifier);
 }
 
 void Keyboard::PressKey(int key_code) {
@@ -32,35 +43,50 @@ void Keyboard::ReleaseKey(int key_code) {
     SetButton(key_identifier, key_code, false);
 }
 
-void Keyboard::SetModifiers(int key_modifiers) {
+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(modifier_identifier, i, key_value);
+        SetButton(keyboard_modifier_identifier, i, key_value);
         // Use the modifier to press the key button equivalent
         switch (i) {
         case Settings::NativeKeyboard::LeftControl:
-            SetButton(key_identifier, Settings::NativeKeyboard::LeftControlKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftControlKey, key_value);
             break;
         case Settings::NativeKeyboard::LeftShift:
-            SetButton(key_identifier, Settings::NativeKeyboard::LeftShiftKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftShiftKey, key_value);
             break;
         case Settings::NativeKeyboard::LeftAlt:
-            SetButton(key_identifier, Settings::NativeKeyboard::LeftAltKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftAltKey, key_value);
             break;
         case Settings::NativeKeyboard::LeftMeta:
-            SetButton(key_identifier, Settings::NativeKeyboard::LeftMetaKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::LeftMetaKey, key_value);
             break;
         case Settings::NativeKeyboard::RightControl:
-            SetButton(key_identifier, Settings::NativeKeyboard::RightControlKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightControlKey,
+                      key_value);
             break;
         case Settings::NativeKeyboard::RightShift:
-            SetButton(key_identifier, Settings::NativeKeyboard::RightShiftKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightShiftKey, key_value);
             break;
         case Settings::NativeKeyboard::RightAlt:
-            SetButton(key_identifier, Settings::NativeKeyboard::RightAltKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightAltKey, key_value);
             break;
         case Settings::NativeKeyboard::RightMeta:
-            SetButton(key_identifier, Settings::NativeKeyboard::RightMetaKey, key_value);
+            SetButton(keyboard_key_identifier, Settings::NativeKeyboard::RightMetaKey, key_value);
             break;
         default:
             // Other modifier keys should be pressed with PressKey since they stay enabled until

src/input_common/drivers/keyboard.h

@@ -28,11 +28,23 @@ public:
      */
     void ReleaseKey(int key_code);
 
+    /**
+     * Sets the status of the keyboard key to pressed
+     * @param key_index index of the key to press
+     */
+    void PressKeyboardKey(int key_index);
+
+    /**
+     * Sets the status of the keyboard key to released
+     * @param key_index index of the key to release
+     */
+    void ReleaseKeyboardKey(int key_index);
+
     /**
      * Sets the status of all keyboard modifier keys
      * @param key_modifiers the code of the key to release
      */
-    void SetModifiers(int key_modifiers);
+    void SetKeyboardModifiers(int key_modifiers);
 
     /// Sets all keys to the non pressed state
     void ReleaseAllKeys();

src/input_common/input_mapping.cpp

@@ -28,6 +28,10 @@ void MappingFactory::RegisterInput(const MappingData& data) {
     if (!is_enabled) {
         return;
     }
+    if (!IsDriverValid(data)) {
+        return;
+    }
+
     switch (input_type) {
     case Polling::InputType::Button:
         RegisterButton(data);
@@ -168,4 +172,25 @@ void MappingFactory::RegisterMotion(const MappingData& data) {
     input_queue.Push(new_input);
 }
 
+bool MappingFactory::IsDriverValid(const MappingData& data) const {
+    // Only port 0 can be mapped on the keyboard
+    if (data.engine == "keyboard" && data.pad.port != 0) {
+        return false;
+    }
+    // The following drivers don't need to be mapped
+    if (data.engine == "tas") {
+        return false;
+    }
+    if (data.engine == "touch") {
+        return false;
+    }
+    if (data.engine == "touch_from_button") {
+        return false;
+    }
+    if (data.engine == "analog_from_button") {
+        return false;
+    }
+    return true;
+}
+
 } // namespace InputCommon

src/input_common/input_mapping.h

@@ -66,6 +66,13 @@ private:
      */
     void RegisterMotion(const MappingData& data);
 
+    /**
+     * Returns true if driver can be mapped
+     * @param "data": An struct containing all the information needed to create a proper
+     * ParamPackage
+     */
+    bool IsDriverValid(const MappingData& data) const;
+
     Common::SPSCQueue<Common::ParamPackage> input_queue;
     Polling::InputType input_type{Polling::InputType::None};
     bool is_enabled{};

src/input_common/main.cpp

@@ -402,15 +402,6 @@ std::string GenerateKeyboardParam(int key_code) {
     return param.Serialize();
 }
 
-std::string GenerateModdifierKeyboardParam(int key_code) {
-    Common::ParamPackage param;
-    param.Set("engine", "keyboard");
-    param.Set("code", key_code);
-    param.Set("toggle", false);
-    param.Set("pad", 1);
-    return param.Serialize();
-}
-
 std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
                                         int key_modifier, float modifier_scale) {
     Common::ParamPackage circle_pad_param{

src/input_common/main.h

@@ -134,9 +134,6 @@ private:
 /// Generates a serialized param package for creating a keyboard button device.
 std::string GenerateKeyboardParam(int key_code);
 
-/// Generates a serialized param package for creating a moddifier keyboard button device.
-std::string GenerateModdifierKeyboardParam(int key_code);
-
 /// Generates a serialized param package for creating an analog device taking input from keyboard.
 std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
                                         int key_modifier, float modifier_scale);