//! Input injection (plan §4): turn client [`punktfunk_core::input::InputEvent`]s into host input. //! //! The headless Sway compositor runs with `WLR_LIBINPUT_NO_DEVICES=1`, so kernel `uinput` //! devices are never picked up. Instead we inject through the wlroots virtual-input Wayland //! protocols — `zwlr_virtual_pointer_manager_v1` + `zwp_virtual_keyboard_manager_v1` — which //! Sway always advertises. We connect as an ordinary Wayland client (the host process //! inherits Sway's `WAYLAND_DISPLAY`/`XDG_RUNTIME_DIR`), bind the two managers, and translate //! events into virtual pointer/keyboard requests. Keyboard codes are Linux evdev; we upload a //! standard evdev/US xkb keymap and track modifier state so the compositor resolves shifted //! keysyms correctly. use anyhow::Result; use punktfunk_core::input::InputEvent; /// Injects input events into the host session. Not `Send`: an injector owns compositor /// resources (a Wayland connection, an xkb state) and lives entirely on the control thread /// that creates it. pub trait InputInjector { fn inject(&mut self, event: &InputEvent) -> Result<()>; } /// Preferred injection backend. #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub enum Backend { /// wlroots virtual pointer + keyboard Wayland protocols — the headless-Sway path. WlrVirtual, /// libei via `reis` — Wayland-native (RemoteDesktop portal). Not yet implemented. Libei, /// libei directly against gamescope's own EIS socket (no portal): input lands in the /// nested game — the SteamOS-like session. GamescopeEi, /// `/dev/uinput` — universal fallback (but invisible to `WLR_LIBINPUT_NO_DEVICES=1`). Uinput, /// Windows `SendInput` (Win32 KeyboardAndMouse) — the Windows host path. SendInput, } pub fn open(backend: Backend) -> Result> { match backend { Backend::WlrVirtual => { #[cfg(target_os = "linux")] { Ok(Box::new(wlr::WlrootsInjector::open()?)) } #[cfg(not(target_os = "linux"))] { anyhow::bail!("wlroots virtual input requires Linux + a Wayland compositor") } } Backend::Libei => { #[cfg(target_os = "linux")] { Ok(Box::new( libei::LibeiInjector::open_with(libei_ei_source())?, )) } #[cfg(not(target_os = "linux"))] { anyhow::bail!("libei input requires Linux + a RemoteDesktop portal") } } Backend::GamescopeEi => { #[cfg(target_os = "linux")] { Ok(Box::new(libei::LibeiInjector::open_with( libei::EiSource::SocketPathFile( crate::vdisplay::gamescope_ei_socket_file().into(), ), )?)) } #[cfg(not(target_os = "linux"))] { anyhow::bail!("gamescope EIS input requires Linux") } } Backend::SendInput => { #[cfg(target_os = "windows")] { Ok(Box::new(sendinput::SendInputInjector::open()?)) } #[cfg(not(target_os = "windows"))] { anyhow::bail!("SendInput injection requires Windows") } } other => anyhow::bail!("injection backend {other:?} not implemented"), } } /// Pick the injection backend for the current session. gamescope hosts its own EIS server (no /// portal), so a gamescope session injects directly into it. wlroots/Sway only implements the /// ScreenCast portal (no RemoteDesktop), so libei can't run there — use the wlr virtual-input /// protocols. KWin and GNOME implement RemoteDesktop but not the wlr protocols, so use libei. /// `PUNKTFUNK_INPUT_BACKEND=wlr|libei|gamescope|uinput` overrides the auto-detection. pub fn default_backend() -> Backend { if let Ok(v) = std::env::var("PUNKTFUNK_INPUT_BACKEND") { match v.trim().to_ascii_lowercase().as_str() { "wlr" | "wlroots" | "wlrvirtual" => return Backend::WlrVirtual, "libei" | "ei" | "portal" => return Backend::Libei, "gamescope" | "gamescope-ei" => return Backend::GamescopeEi, "uinput" => return Backend::Uinput, "sendinput" | "win" | "windows" => return Backend::SendInput, other => tracing::warn!( value = other, "unknown PUNKTFUNK_INPUT_BACKEND — auto-detecting" ), } } #[cfg(target_os = "windows")] { Backend::SendInput } #[cfg(not(target_os = "windows"))] { if std::env::var("PUNKTFUNK_COMPOSITOR") .is_ok_and(|v| v.trim().eq_ignore_ascii_case("gamescope")) { return Backend::GamescopeEi; } let desktop = std::env::var("XDG_CURRENT_DESKTOP").unwrap_or_default(); let d = desktop.to_ascii_uppercase(); if d.contains("KDE") || d.contains("GNOME") { Backend::Libei } else { Backend::WlrVirtual } } } /// How the libei backend reaches its EIS server. KWin goes through the `RemoteDesktop` *portal* /// (with a pre-seeded grant), but GNOME's portal `Start()` needs an interactive approval a /// headless host can't answer — so GNOME goes straight to Mutter's *direct* RemoteDesktop EIS /// (`org.gnome.Mutter.RemoteDesktop`), the same direct API the Mutter video backend uses. #[cfg(target_os = "linux")] fn libei_ei_source() -> libei::EiSource { let gnome = std::env::var("PUNKTFUNK_COMPOSITOR") .is_ok_and(|v| v.trim().eq_ignore_ascii_case("mutter")) || std::env::var("XDG_CURRENT_DESKTOP") .unwrap_or_default() .to_ascii_uppercase() .contains("GNOME"); if gnome { libei::EiSource::MutterEis } else { libei::EiSource::Portal } } /// Map a Windows Virtual-Key code (as sent by Moonlight/GameStream) to a Linux evdev key code. pub fn vk_to_evdev(vk: u8) -> Option { match vk { // --- Navigation / editing / whitespace --- 0x08 => Some(14), // VK_BACK -> KEY_BACKSPACE 0x09 => Some(15), // VK_TAB -> KEY_TAB 0x0D => Some(28), // VK_RETURN -> KEY_ENTER 0x13 => Some(119), // VK_PAUSE -> KEY_PAUSE 0x14 => Some(58), // VK_CAPITAL -> KEY_CAPSLOCK 0x1B => Some(1), // VK_ESCAPE -> KEY_ESC 0x20 => Some(57), // VK_SPACE -> KEY_SPACE 0x21 => Some(104), // VK_PRIOR -> KEY_PAGEUP 0x22 => Some(109), // VK_NEXT -> KEY_PAGEDOWN 0x23 => Some(107), // VK_END -> KEY_END 0x24 => Some(102), // VK_HOME -> KEY_HOME 0x25 => Some(105), // VK_LEFT -> KEY_LEFT 0x26 => Some(103), // VK_UP -> KEY_UP 0x27 => Some(106), // VK_RIGHT -> KEY_RIGHT 0x28 => Some(108), // VK_DOWN -> KEY_DOWN 0x2C => Some(99), // VK_SNAPSHOT -> KEY_SYSRQ 0x2D => Some(110), // VK_INSERT -> KEY_INSERT 0x2E => Some(111), // VK_DELETE -> KEY_DELETE // --- Generic modifiers --- 0x10 => Some(42), // VK_SHIFT -> KEY_LEFTSHIFT 0x11 => Some(29), // VK_CONTROL -> KEY_LEFTCTRL 0x12 => Some(56), // VK_MENU -> KEY_LEFTALT // --- Digit row (KEY_0 is 11, KEY_1..KEY_9 are 2..10) --- 0x30 => Some(11), // VK_0 0x31 => Some(2), // VK_1 0x32 => Some(3), // VK_2 0x33 => Some(4), // VK_3 0x34 => Some(5), // VK_4 0x35 => Some(6), // VK_5 0x36 => Some(7), // VK_6 0x37 => Some(8), // VK_7 0x38 => Some(9), // VK_8 0x39 => Some(10), // VK_9 // --- Letters A-Z (NOT sequential in evdev) --- 0x41 => Some(30), // A 0x42 => Some(48), // B 0x43 => Some(46), // C 0x44 => Some(32), // D 0x45 => Some(18), // E 0x46 => Some(33), // F 0x47 => Some(34), // G 0x48 => Some(35), // H 0x49 => Some(23), // I 0x4A => Some(36), // J 0x4B => Some(37), // K 0x4C => Some(38), // L 0x4D => Some(50), // M 0x4E => Some(49), // N 0x4F => Some(24), // O 0x50 => Some(25), // P 0x51 => Some(16), // Q 0x52 => Some(19), // R 0x53 => Some(31), // S 0x54 => Some(20), // T 0x55 => Some(22), // U 0x56 => Some(47), // V 0x57 => Some(17), // W 0x58 => Some(45), // X 0x59 => Some(21), // Y 0x5A => Some(44), // Z // --- Meta / context-menu --- 0x5B => Some(125), // VK_LWIN -> KEY_LEFTMETA 0x5C => Some(126), // VK_RWIN -> KEY_RIGHTMETA 0x5D => Some(127), // VK_APPS -> KEY_COMPOSE // --- Numpad --- 0x60 => Some(82), // KP0 0x61 => Some(79), // KP1 0x62 => Some(80), // KP2 0x63 => Some(81), // KP3 0x64 => Some(75), // KP4 0x65 => Some(76), // KP5 0x66 => Some(77), // KP6 0x67 => Some(71), // KP7 0x68 => Some(72), // KP8 0x69 => Some(73), // KP9 0x6A => Some(55), // VK_MULTIPLY -> KEY_KPASTERISK 0x6B => Some(78), // VK_ADD -> KEY_KPPLUS 0x6C => Some(96), // VK_SEPARATOR -> KEY_KPENTER 0x6D => Some(74), // VK_SUBTRACT -> KEY_KPMINUS 0x6E => Some(83), // VK_DECIMAL -> KEY_KPDOT 0x6F => Some(98), // VK_DIVIDE -> KEY_KPSLASH // --- Function keys (F1..F10 = 59..68, F11/F12 = 87/88) --- 0x70 => Some(59), 0x71 => Some(60), 0x72 => Some(61), 0x73 => Some(62), 0x74 => Some(63), 0x75 => Some(64), 0x76 => Some(65), 0x77 => Some(66), 0x78 => Some(67), 0x79 => Some(68), 0x7A => Some(87), 0x7B => Some(88), // --- Locks --- 0x90 => Some(69), // VK_NUMLOCK -> KEY_NUMLOCK 0x91 => Some(70), // VK_SCROLL -> KEY_SCROLLLOCK // --- Left/right modifiers --- 0xA0 => Some(42), // VK_LSHIFT -> KEY_LEFTSHIFT 0xA1 => Some(54), // VK_RSHIFT -> KEY_RIGHTSHIFT 0xA2 => Some(29), // VK_LCONTROL -> KEY_LEFTCTRL 0xA3 => Some(97), // VK_RCONTROL -> KEY_RIGHTCTRL 0xA4 => Some(56), // VK_LMENU -> KEY_LEFTALT 0xA5 => Some(100), // VK_RMENU -> KEY_RIGHTALT // --- OEM punctuation (US layout) --- 0xBA => Some(39), // VK_OEM_1 -> KEY_SEMICOLON 0xBB => Some(13), // VK_OEM_PLUS -> KEY_EQUAL 0xBC => Some(51), // VK_OEM_COMMA -> KEY_COMMA 0xBD => Some(12), // VK_OEM_MINUS -> KEY_MINUS 0xBE => Some(52), // VK_OEM_PERIOD -> KEY_DOT 0xBF => Some(53), // VK_OEM_2 -> KEY_SLASH 0xC0 => Some(41), // VK_OEM_3 -> KEY_GRAVE 0xDB => Some(26), // VK_OEM_4 -> KEY_LEFTBRACE 0xDC => Some(43), // VK_OEM_5 -> KEY_BACKSLASH 0xDD => Some(27), // VK_OEM_6 -> KEY_RIGHTBRACE 0xDE => Some(40), // VK_OEM_7 -> KEY_APOSTROPHE 0xE2 => Some(86), // VK_OEM_102 -> KEY_102ND _ => None, } } /// Map a GameStream mouse button id (1=left … 5=X2) to a Linux evdev `BTN_*` code. #[cfg(target_os = "linux")] fn gs_button_to_evdev(b: u32) -> Option { Some(match b { 1 => 0x110, // BTN_LEFT 2 => 0x112, // BTN_MIDDLE 3 => 0x111, // BTN_RIGHT 4 => 0x113, // BTN_SIDE (X1) 5 => 0x114, // BTN_EXTRA (X2) _ => return None, }) } #[cfg(target_os = "linux")] pub mod dualsense; #[cfg(target_os = "linux")] pub mod gamepad; /// Windows: virtual Xbox 360 pads via ViGEmBus. #[cfg(target_os = "windows")] #[path = "inject/gamepad_windows.rs"] pub mod gamepad; /// Stub — virtual gamepads need Linux uinput or Windows ViGEmBus; events are dropped elsewhere. #[cfg(not(any(target_os = "linux", target_os = "windows")))] pub mod gamepad { #[derive(Default)] pub struct GamepadManager; impl GamepadManager { pub fn new() -> Self { GamepadManager } pub fn handle(&mut self, _ev: &crate::gamestream::gamepad::GamepadEvent) {} pub fn pump_rumble(&mut self, _send: impl FnMut(u16, u16, u16)) {} } } #[cfg(target_os = "linux")] mod libei; #[cfg(target_os = "windows")] mod sendinput; #[cfg(target_os = "linux")] mod wlr;