feat(input): implement Gamepad button translation and Android keycodes

crates/molotov-core/src/input/gamepad.rs

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum GamepadType {
+    Xbox,
+    PlayStation,
+    NintendoSwitch,
+    Generic,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum GamepadButton {
+    South, // A (Xbox) / Cross (PS) / B (Switch)
+    East,  // B (Xbox) / Circle (PS) / A (Switch)
+    West,  // X (Xbox) / Square (PS) / Y (Switch)
+    North, // Y (Xbox) / Triangle (PS) / X (Switch)
+    Back,
+    Guide,
+    Start,
+    LeftStick,
+    RightStick,
+    LeftShoulder,
+    RightShoulder,
+    DpadUp,
+    DpadDown,
+    DpadLeft,
+    DpadRight,
+}
+
+#[repr(i32)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AndroidKeyCode {
+    DpadUp = 19,
+    DpadDown = 20,
+    DpadLeft = 21,
+    DpadRight = 22,
+    DpadCenter = 23,
+    ButtonA = 96,
+    ButtonB = 97,
+    ButtonC = 98,
+    ButtonX = 99,
+    ButtonY = 100,
+    ButtonZ = 101,
+    ButtonL1 = 102,
+    ButtonR1 = 103,
+    ButtonL2 = 104,
+    ButtonR2 = 105,
+    ButtonThumbL = 106,
+    ButtonThumbR = 107,
+    ButtonStart = 108,
+    ButtonSelect = 109,
+    ButtonMode = 110,
+}
+
+pub fn translate_button_to_android(btn: GamepadButton, _gamepad_type: GamepadType) -> AndroidKeyCode {
+    match btn {
+        GamepadButton::South => AndroidKeyCode::ButtonA,
+        GamepadButton::East => AndroidKeyCode::ButtonB,
+        GamepadButton::West => AndroidKeyCode::ButtonX,
+        GamepadButton::North => AndroidKeyCode::ButtonY,
+        GamepadButton::Back => AndroidKeyCode::ButtonSelect,
+        GamepadButton::Guide => AndroidKeyCode::ButtonMode,
+        GamepadButton::Start => AndroidKeyCode::ButtonStart,
+        GamepadButton::LeftStick => AndroidKeyCode::ButtonThumbL,
+        GamepadButton::RightStick => AndroidKeyCode::ButtonThumbR,
+        GamepadButton::LeftShoulder => AndroidKeyCode::ButtonL1,
+        GamepadButton::RightShoulder => AndroidKeyCode::ButtonR1,
+        GamepadButton::DpadUp => AndroidKeyCode::DpadUp,
+        GamepadButton::DpadDown => AndroidKeyCode::DpadDown,
+        GamepadButton::DpadLeft => AndroidKeyCode::DpadLeft,
+        GamepadButton::DpadRight => AndroidKeyCode::DpadRight,
+    }
+}

crates/molotov-core/src/input/mod.rs

@@ -1,2 +1,3 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
+pub mod gamepad;
 pub mod ime;

crates/molotov-core/tests/gamepad_mapping_test.rs

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+use molotov_core::input::gamepad::{
+    translate_button_to_android, AndroidKeyCode, GamepadButton, GamepadType,
+};
+
+#[test]
+fn test_xbox_and_playstation_button_mapping() {
+    // Xbox 'A' button -> Android KEYCODE_BUTTON_A
+    assert_eq!(
+        translate_button_to_android(GamepadButton::South, GamepadType::Xbox),
+        AndroidKeyCode::ButtonA
+    );
+
+    // PlayStation 'Cross' button -> Android KEYCODE_BUTTON_A
+    assert_eq!(
+        translate_button_to_android(GamepadButton::South, GamepadType::PlayStation),
+        AndroidKeyCode::ButtonA
+    );
+
+    // D-Pad Up -> Android KEYCODE_DPAD_UP
+    assert_eq!(
+        translate_button_to_android(GamepadButton::DpadUp, GamepadType::Xbox),
+        AndroidKeyCode::DpadUp
+    );
+}