Implement undocumented mouse binding for the Ineluki patch

src/game_ineluki.cpp

@@ -173,6 +173,40 @@ bool Game_Ineluki::Execute(StringView ini_file) {
 			// no-op
 		} else if (cmd.name == "registercheatevent") {
 			cheatlist.emplace_back(Utils::LowerCase(cmd.arg), atoi(cmd.arg2.c_str()));
+		} else if (cmd.name == "setmouseasreturn") {
+			// This command is only found in a few uncommon versions of the patch
+			if (!mouse_support) {
+				return true;
+			}
+			std::string arg_lower = Utils::LowerCase(cmd.arg);
+			if (arg_lower == "left") {
+				mouse_decision_binding = MouseReturnMode::Left;
+			} else if (arg_lower == "right") {
+				mouse_decision_binding = MouseReturnMode::Right;
+			} else if (arg_lower == "both") {
+				mouse_decision_binding = MouseReturnMode::Both;
+			} else if (arg_lower == "none") {
+				mouse_decision_binding = MouseReturnMode::None;
+			} else {
+				Output::Warning("Ineluki: Invalid value for setMouseAsReturn");
+				mouse_decision_binding = MouseReturnMode::None;
+			}
+		} else if (cmd.name == "setmousewheelaskeys") {
+			// This command is only found in a few uncommon versions of the patch
+			if (!mouse_support) {
+				return true;
+			}
+			std::string arg_lower = Utils::LowerCase(cmd.arg);
+			if (arg_lower == "updown") {
+				mouse_wheel_binding = MouseWheelMode::UpDown;
+			} else if (arg_lower == "leftright") {
+				mouse_wheel_binding = MouseWheelMode::LeftRight;
+			} else if (arg_lower == "none") {
+				mouse_wheel_binding = MouseWheelMode::None;
+			} else {
+				Output::Warning("Ineluki: Invalid value for setMouseWheelAsKeys");
+				mouse_wheel_binding = MouseWheelMode::None;
+			}
 		}
 	}
 
@@ -263,6 +297,10 @@ bool Game_Ineluki::Parse(StringView ini_file) {
 		} else if (cmd.name == "registercheatevent") {
 			cmd.arg = ini.Get(section, "cheat", std::string());
 			cmd.arg2 = ini.Get(section, "value", std::string());
+		} else if (cmd.name == "setmouseasreturn") {
+			cmd.arg = ini.Get(section, "value", std::string());
+		} else if (cmd.name == "setmousewheelaskeys") {
+			cmd.arg = ini.Get(section, "value", std::string());
 		} else {
 			Output::Debug("Ineluki: Unknown command {}", cmd.name);
 			valid = false;
@@ -294,10 +332,15 @@ int Game_Ineluki::GetMidiTicks() {
 }
 
 void Game_Ineluki::Update() {
-	if (!key_support) {
-		return;
+	if (key_support) {
+		UpdateKeys();
+	}
+	if (mouse_support) {
+		UpdateMouse();
 	}
+}
 
+void Game_Ineluki::UpdateKeys() {
 	for (const auto& key : keylist_down) {
 		if (Input::IsRawKeyTriggered(key.key)) {
 			output_list.push_back(key.value);
@@ -332,6 +375,34 @@ void Game_Ineluki::Update() {
 	}
 }
 
+void Game_Ineluki::UpdateMouse() {
+#if defined(USE_MOUSE) && defined(SUPPORT_MOUSE)
+	if (Input::IsRawKeyTriggered(Input::Keys::MOUSE_LEFT)) {
+		if ((mouse_decision_binding == MouseReturnMode::Left || mouse_decision_binding == MouseReturnMode::Both)) {
+			Input::SimulateButtonPress(Input::DECISION);
+		}
+	} else if (Input::IsRawKeyTriggered(Input::Keys::MOUSE_RIGHT)) {
+		if ((mouse_decision_binding == MouseReturnMode::Right || mouse_decision_binding == MouseReturnMode::Both)) {
+			Input::SimulateButtonPress(Input::DECISION);
+		}
+	}
+
+	if (Input::IsRawKeyTriggered(Input::Keys::MOUSE_SCROLLUP)) {
+		if (mouse_wheel_binding == MouseWheelMode::UpDown) {
+			Input::SimulateButtonPress(Input::UP);
+		} else if (mouse_wheel_binding == MouseWheelMode::LeftRight) {
+			Input::SimulateButtonPress(Input::LEFT);
+		}
+	} else if (Input::IsRawKeyTriggered(Input::Keys::MOUSE_SCROLLDOWN)) {
+		if (mouse_wheel_binding == MouseWheelMode::UpDown) {
+			Input::SimulateButtonPress(Input::DOWN);
+		} else if (mouse_wheel_binding == MouseWheelMode::LeftRight) {
+			Input::SimulateButtonPress(Input::RIGHT);
+		}
+	}
+#endif
+}
+
 void Game_Ineluki::OnScriptFileReady(FileRequestResult* result) {
 	auto it = std::find_if(async_scripts.begin(), async_scripts.end(), [&](const auto& a) {
 		return a.script_name == result->file;

src/game_ineluki.h

@@ -74,11 +74,21 @@ class Game_Ineluki {
 	int GetMidiTicks();
 
 	/**
-	 * Updates the key up/down list. Must be called once per update frame.
+	 * Updates the configured input patches. Must be called once per update frame.
 	 */
 	void Update();
 
 private:
+	/**
+	 * Updates the key up/down list.
+	 */
+	void UpdateKeys();
+
+	/**
+	 * Handles virtual key bindings for mouse buttons.
+	 */
+	void UpdateMouse();
+
 	/**
 	 * Parses and caches the script.
 	 *
@@ -123,6 +133,22 @@ class Game_Ineluki {
 	bool mouse_support = false;
 	int mouse_id_prefix = 0;
 
+	enum class MouseReturnMode {
+		None,
+		Left,
+		Right,
+		Both
+	};
+
+	enum class MouseWheelMode {
+		None,
+		UpDown,
+		LeftRight
+	};
+
+	MouseReturnMode mouse_decision_binding = MouseReturnMode::None;
+	MouseWheelMode mouse_wheel_binding = MouseWheelMode::None;
+
 	struct Mapping {
 		Input::Keys::InputKey key;
 		const char* name;

src/input.cpp

@@ -408,3 +408,27 @@ void Input::ResetMask() {
 	SetMask(source->GetMask());
 }
 
+void Input::SimulateButtonPress(Input::InputButton button) {
+	switch (button) {
+		case Input::UP:
+		case Input::DOWN:
+		case Input::LEFT:
+		case Input::RIGHT:
+		{
+			// Directional movement has its own input handling
+			// These buttons need to be simulated on a lower level,
+			// or else those movement actions will be overwritten
+			auto& cfg = source->GetConfig();
+			for (auto& bm : cfg.buttons) {
+				if (bm.first == button) {
+					source->SimulateKeyPress(bm.second);
+					break;
+				}
+			}
+			break;
+		}
+		default:
+			break;
+	}
+	UpdateButton(button, true);
+}

src/input.h

@@ -303,6 +303,15 @@ namespace Input {
 	 */
 	 Source* GetInputSource();
 
+	/**
+	* Used to simulate a button press. This is used for
+	* emulating the behavior of some runtime patches.
+	* Buttons for directional movement will be delegated
+	* to the underlying low level input source.
+	* @param button The input button which should be registered as being 'pressed'
+	*/
+	void SimulateButtonPress(Input::InputButton button);
+
 	/** Buttons press time (in frames). */
 	extern std::array<int, BUTTON_COUNT> press_time;
 

src/input_source.cpp

@@ -64,9 +64,10 @@ void Input::UiSource::DoUpdate(bool system_only) {
 		}
 
 		if (!system_only || Input::IsSystemButton(bm.first)) {
-			pressed_buttons[bm.first] = pressed_buttons[bm.first] || keystates[bm.second];
+			pressed_buttons[bm.first] = pressed_buttons[bm.first] || keystates[bm.second] || keystates_virtual[bm.second];
 		}
 	}
+	keystates_virtual = {};
 
 	Record();
 
@@ -330,6 +331,10 @@ void Input::Source::AddRecordingData(Input::RecordingData type, StringView data)
 	}
 }
 
+void Input::Source::SimulateKeyPress(Input::Keys::InputKey key) {
+	keystates_virtual[key] = true;
+}
+
 void Input::LogSource::UpdateSystem() {
 	// input log does not record actions outside of logical frames.
 }

src/input_source.h

@@ -139,6 +139,12 @@ namespace Input {
 		const KeyStatus& GetMask() const { return keymask; }
 		KeyStatus& GetMask() { return keymask; }
 
+		/**
+		* Emulate a key being pressed.
+		* @param key
+		*/
+		void SimulateKeyPress(Input::Keys::InputKey key);
+
 	protected:
 		void Record();
 		void UpdateGamepad();
@@ -152,6 +158,7 @@ namespace Input {
 
 		KeyStatus keystates;
 		KeyStatus keymask;
+		KeyStatus keystates_virtual;
 		Point mouse_pos;
 		AnalogInput analog_input;