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| 1 | +//! garlock - Screen locker for the gar desktop suite |
| 2 | +//! |
| 3 | +//! A swaylock-inspired screen locker with circular ring indicator, |
| 4 | +//! blur effects, and PAM authentication. |
| 5 | + |
| 6 | +use anyhow::Result; |
| 7 | +use clap::Parser; |
| 8 | +use std::path::PathBuf; |
| 9 | +use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter}; |
| 10 | +use x11rb::connection::Connection; |
| 11 | + |
| 12 | +mod auth; |
| 13 | +mod background; |
| 14 | +mod config; |
| 15 | +mod error; |
| 16 | +mod keyboard; |
| 17 | +mod password; |
| 18 | +mod ring; |
| 19 | +mod screenshot; |
| 20 | +mod state; |
| 21 | +mod x11; |
| 22 | + |
| 23 | +use auth::{authenticate_async, get_current_username, AuthResult, PendingAuth}; |
| 24 | +use background::Background; |
| 25 | +use config::Config; |
| 26 | +use keyboard::{KeyResult, Keyboard}; |
| 27 | +use password::Password; |
| 28 | +use ring::{composite_ring, RingRenderer}; |
| 29 | +use screenshot::Screenshot; |
| 30 | +use state::{InputState, LockerState}; |
| 31 | +use x11::LockerWindow; |
| 32 | + |
| 33 | +/// Screen locker for the gar desktop suite |
| 34 | +#[derive(Parser, Debug)] |
| 35 | +#[command(name = "garlock", version, about, long_about = None)] |
| 36 | +struct Args { |
| 37 | + /// Run in daemon mode (listen for IPC lock commands) |
| 38 | + #[arg(long)] |
| 39 | + daemon: bool, |
| 40 | + |
| 41 | + /// Config file path (default: ~/.config/garlock/config.toml) |
| 42 | + #[arg(long, short)] |
| 43 | + config: Option<PathBuf>, |
| 44 | + |
| 45 | + /// Enable debug logging |
| 46 | + #[arg(long, short)] |
| 47 | + debug: bool, |
| 48 | + |
| 49 | + /// Lock immediately without daemon mode |
| 50 | + #[arg(long)] |
| 51 | + lock: bool, |
| 52 | +} |
| 53 | + |
| 54 | +fn main() -> Result<()> { |
| 55 | + let args = Args::parse(); |
| 56 | + |
| 57 | + // Initialize logging |
| 58 | + let log_level = if args.debug { "debug" } else { "info" }; |
| 59 | + tracing_subscriber::registry() |
| 60 | + .with( |
| 61 | + EnvFilter::try_from_default_env() |
| 62 | + .unwrap_or_else(|_| EnvFilter::new(log_level)), |
| 63 | + ) |
| 64 | + .with(tracing_subscriber::fmt::layer()) |
| 65 | + .init(); |
| 66 | + |
| 67 | + tracing::info!("garlock {} starting", env!("CARGO_PKG_VERSION")); |
| 68 | + tracing::debug!(?args, "Command line arguments"); |
| 69 | + |
| 70 | + // Load configuration |
| 71 | + let config = Config::load(args.config.as_deref())?; |
| 72 | + tracing::debug!(?config, "Configuration loaded"); |
| 73 | + |
| 74 | + if args.daemon { |
| 75 | + tracing::info!("Running in daemon mode"); |
| 76 | + run_daemon(config) |
| 77 | + } else { |
| 78 | + tracing::info!("Locking screen"); |
| 79 | + run_lock(config) |
| 80 | + } |
| 81 | +} |
| 82 | + |
| 83 | +/// Run in daemon mode, listening for IPC lock commands |
| 84 | +fn run_daemon(_config: Config) -> Result<()> { |
| 85 | + // TODO: Sprint 7 - IPC server implementation |
| 86 | + tracing::warn!("Daemon mode not yet implemented"); |
| 87 | + Ok(()) |
| 88 | +} |
| 89 | + |
| 90 | +/// Lock the screen immediately |
| 91 | +fn run_lock(config: Config) -> Result<()> { |
| 92 | + // Step 1: Capture screenshot BEFORE creating locker window |
| 93 | + tracing::info!("Capturing screenshot..."); |
| 94 | + let mut background = match Screenshot::capture() { |
| 95 | + Ok(screenshot) => { |
| 96 | + tracing::debug!( |
| 97 | + width = screenshot.width, |
| 98 | + height = screenshot.height, |
| 99 | + "Screenshot captured, applying blur" |
| 100 | + ); |
| 101 | + |
| 102 | + // Process with blur and brightness from config |
| 103 | + match Background::from_screenshot( |
| 104 | + screenshot, |
| 105 | + config.background.blur_radius, |
| 106 | + config.background.brightness, |
| 107 | + ) { |
| 108 | + Ok(bg) => bg, |
| 109 | + Err(e) => { |
| 110 | + tracing::warn!("Failed to process screenshot: {}, using fallback", e); |
| 111 | + let (conn, screen_num) = x11rb::connect(None)?; |
| 112 | + let screen = &conn.setup().roots[screen_num]; |
| 113 | + Background::solid_color( |
| 114 | + screen.width_in_pixels as u32, |
| 115 | + screen.height_in_pixels as u32, |
| 116 | + &config.background.fallback_color, |
| 117 | + ) |
| 118 | + } |
| 119 | + } |
| 120 | + } |
| 121 | + Err(e) => { |
| 122 | + tracing::warn!("Failed to capture screenshot: {}, using fallback", e); |
| 123 | + let (conn, screen_num) = x11rb::connect(None)?; |
| 124 | + let screen = &conn.setup().roots[screen_num]; |
| 125 | + Background::solid_color( |
| 126 | + screen.width_in_pixels as u32, |
| 127 | + screen.height_in_pixels as u32, |
| 128 | + &config.background.fallback_color, |
| 129 | + ) |
| 130 | + } |
| 131 | + }; |
| 132 | + |
| 133 | + // Keep a clean copy of the background for re-compositing |
| 134 | + let background_clean = background.data.clone(); |
| 135 | + let bg_width = background.width; |
| 136 | + let bg_height = background.height; |
| 137 | + |
| 138 | + // Step 2: Create fullscreen locker window with input grabs |
| 139 | + tracing::info!("Creating locker window..."); |
| 140 | + let locker = LockerWindow::new()?; |
| 141 | + |
| 142 | + // Step 3: Initialize keyboard handler with XKB |
| 143 | + tracing::info!("Initializing keyboard handler..."); |
| 144 | + let mut keyboard = Keyboard::new()?; |
| 145 | + |
| 146 | + // Step 4: Initialize password buffer |
| 147 | + let mut password = Password::new(); |
| 148 | + |
| 149 | + // Step 5: Initialize state machine |
| 150 | + let mut locker_state = LockerState::new(); |
| 151 | + |
| 152 | + // Step 6: Initialize ring renderer |
| 153 | + tracing::info!("Initializing ring indicator..."); |
| 154 | + let mut ring = RingRenderer::from_config(&config.ring); |
| 155 | + |
| 156 | + // Get ring center position (center of primary monitor, or screen center) |
| 157 | + let (ring_cx, ring_cy) = match locker.get_monitors() { |
| 158 | + Ok(monitors) => { |
| 159 | + if let Some(primary) = monitors.primary() { |
| 160 | + let (cx, cy) = primary.center(); |
| 161 | + tracing::info!( |
| 162 | + monitor = %primary.name, |
| 163 | + center_x = cx, |
| 164 | + center_y = cy, |
| 165 | + "Ring centered on primary monitor" |
| 166 | + ); |
| 167 | + (cx as i32, cy as i32) |
| 168 | + } else { |
| 169 | + (bg_width as i32 / 2, bg_height as i32 / 2) |
| 170 | + } |
| 171 | + } |
| 172 | + Err(e) => { |
| 173 | + tracing::warn!("Failed to detect monitors: {}, centering on screen", e); |
| 174 | + (bg_width as i32 / 2, bg_height as i32 / 2) |
| 175 | + } |
| 176 | + }; |
| 177 | + |
| 178 | + // Helper to composite ring onto background and display |
| 179 | + let render_frame = |background: &mut Background, |
| 180 | + background_clean: &[u8], |
| 181 | + ring: &RingRenderer, |
| 182 | + locker: &LockerWindow, |
| 183 | + ring_cx: i32, |
| 184 | + ring_cy: i32| |
| 185 | + -> Result<()> { |
| 186 | + // Reset background to clean state |
| 187 | + background.data.copy_from_slice(background_clean); |
| 188 | + |
| 189 | + // Render ring to surface |
| 190 | + let mut ring_surface = ring.render()?; |
| 191 | + let ring_data = RingRenderer::surface_to_bgra(&mut ring_surface)?; |
| 192 | + let (ring_w, ring_h) = ring.size(); |
| 193 | + |
| 194 | + // Composite ring onto background |
| 195 | + let dest_x = ring_cx - ring_w / 2; |
| 196 | + let dest_y = ring_cy - ring_h / 2; |
| 197 | + |
| 198 | + composite_ring( |
| 199 | + &mut background.data, |
| 200 | + background.width, |
| 201 | + background.height, |
| 202 | + &ring_data, |
| 203 | + ring_w as u32, |
| 204 | + ring_h as u32, |
| 205 | + dest_x, |
| 206 | + dest_y, |
| 207 | + ); |
| 208 | + |
| 209 | + locker.put_image(&background.data)?; |
| 210 | + Ok(()) |
| 211 | + }; |
| 212 | + |
| 213 | + // Initial render |
| 214 | + render_frame( |
| 215 | + &mut background, |
| 216 | + &background_clean, |
| 217 | + &ring, |
| 218 | + &locker, |
| 219 | + ring_cx, |
| 220 | + ring_cy, |
| 221 | + )?; |
| 222 | + |
| 223 | + // Get current username for PAM authentication |
| 224 | + let username = get_current_username()?; |
| 225 | + tracing::info!(%username, "Locking session for user"); |
| 226 | + |
| 227 | + // Track pending authentication |
| 228 | + let mut pending_auth: Option<PendingAuth> = None; |
| 229 | + |
| 230 | + tracing::info!("Entering event loop (press Escape to exit - dev mode only)"); |
| 231 | + |
| 232 | + let mut needs_redraw = false; |
| 233 | + |
| 234 | + loop { |
| 235 | + // Process events |
| 236 | + match locker.poll_for_event()? { |
| 237 | + Some(event) => { |
| 238 | + match event { |
| 239 | + x11rb::protocol::Event::KeyPress(key_event) => { |
| 240 | + let keycode = key_event.detail; |
| 241 | + tracing::debug!(keycode, "Key press"); |
| 242 | + |
| 243 | + // Process key through XKB |
| 244 | + let key_result = keyboard.process_key(keycode, true); |
| 245 | + |
| 246 | + match key_result { |
| 247 | + KeyResult::Escape => { |
| 248 | + tracing::info!("Escape pressed, exiting (dev mode)"); |
| 249 | + break; |
| 250 | + } |
| 251 | + |
| 252 | + KeyResult::Char(c) => { |
| 253 | + if password.push(c) { |
| 254 | + locker_state.on_input(InputState::Letter); |
| 255 | + ring.set_state(locker_state.ring_state()); |
| 256 | + ring.advance_highlight(); |
| 257 | + needs_redraw = true; |
| 258 | + tracing::debug!( |
| 259 | + chars = password.char_count(), |
| 260 | + "Character added to password" |
| 261 | + ); |
| 262 | + } |
| 263 | + } |
| 264 | + |
| 265 | + KeyResult::Backspace => { |
| 266 | + if password.pop() { |
| 267 | + locker_state.on_input(InputState::Backspace); |
| 268 | + ring.set_state(locker_state.ring_state()); |
| 269 | + ring.retreat_highlight(); |
| 270 | + } else { |
| 271 | + locker_state.on_input(InputState::Clear); |
| 272 | + ring.set_state(locker_state.ring_state()); |
| 273 | + ring.clear_highlight(); |
| 274 | + } |
| 275 | + needs_redraw = true; |
| 276 | + tracing::debug!(chars = password.char_count(), "Backspace"); |
| 277 | + } |
| 278 | + |
| 279 | + KeyResult::Clear => { |
| 280 | + password.clear(); |
| 281 | + locker_state.on_input(InputState::Clear); |
| 282 | + ring.set_state(locker_state.ring_state()); |
| 283 | + ring.clear_highlight(); |
| 284 | + needs_redraw = true; |
| 285 | + tracing::debug!("Password cleared (Ctrl+U)"); |
| 286 | + } |
| 287 | + |
| 288 | + KeyResult::Enter => { |
| 289 | + if !password.is_empty() && pending_auth.is_none() { |
| 290 | + locker_state.start_validation(); |
| 291 | + ring.set_state(locker_state.ring_state()); |
| 292 | + needs_redraw = true; |
| 293 | + tracing::info!( |
| 294 | + chars = password.char_count(), |
| 295 | + "Starting PAM authentication" |
| 296 | + ); |
| 297 | + |
| 298 | + // Start async PAM authentication |
| 299 | + pending_auth = Some(authenticate_async( |
| 300 | + username.clone(), |
| 301 | + password.as_str().to_string(), |
| 302 | + )); |
| 303 | + password.clear(); |
| 304 | + ring.clear_highlight(); |
| 305 | + } |
| 306 | + } |
| 307 | + |
| 308 | + KeyResult::Modifier => { |
| 309 | + locker_state.on_input(InputState::Neutral); |
| 310 | + // Check caps lock state |
| 311 | + if keyboard.caps_lock_active() { |
| 312 | + tracing::debug!("Caps Lock is active"); |
| 313 | + } |
| 314 | + } |
| 315 | + |
| 316 | + KeyResult::Ignored => { |
| 317 | + // Function keys, navigation, etc. |
| 318 | + } |
| 319 | + } |
| 320 | + } |
| 321 | + |
| 322 | + x11rb::protocol::Event::KeyRelease(key_event) => { |
| 323 | + // Update XKB state for key releases |
| 324 | + keyboard.process_key(key_event.detail, false); |
| 325 | + } |
| 326 | + |
| 327 | + x11rb::protocol::Event::Expose(_) => { |
| 328 | + tracing::trace!("Expose event"); |
| 329 | + needs_redraw = true; |
| 330 | + } |
| 331 | + |
| 332 | + _ => { |
| 333 | + tracing::trace!(?event, "Unhandled event"); |
| 334 | + } |
| 335 | + } |
| 336 | + } |
| 337 | + None => { |
| 338 | + // Check for pending authentication result |
| 339 | + if let Some(ref auth) = pending_auth { |
| 340 | + if let Some(result) = auth.try_recv() { |
| 341 | + match result { |
| 342 | + AuthResult::Success => { |
| 343 | + tracing::info!("Authentication successful, unlocking screen"); |
| 344 | + locker_state.on_auth_success(); |
| 345 | + break; // Exit loop to unlock |
| 346 | + } |
| 347 | + AuthResult::Failure(msg) => { |
| 348 | + tracing::warn!("Authentication failed: {}", msg); |
| 349 | + locker_state.on_auth_failure(); |
| 350 | + ring.set_state(locker_state.ring_state()); |
| 351 | + needs_redraw = true; |
| 352 | + |
| 353 | + // TODO: Check for cooldown after max_attempts |
| 354 | + } |
| 355 | + } |
| 356 | + pending_auth = None; |
| 357 | + } |
| 358 | + } |
| 359 | + |
| 360 | + // Check timers and redraw if needed |
| 361 | + if locker_state.update_timers() { |
| 362 | + needs_redraw = true; |
| 363 | + } |
| 364 | + |
| 365 | + if needs_redraw { |
| 366 | + // Update ring state from locker state |
| 367 | + ring.set_state(locker_state.ring_state()); |
| 368 | + |
| 369 | + render_frame( |
| 370 | + &mut background, |
| 371 | + &background_clean, |
| 372 | + &ring, |
| 373 | + &locker, |
| 374 | + ring_cx, |
| 375 | + ring_cy, |
| 376 | + )?; |
| 377 | + needs_redraw = false; |
| 378 | + } |
| 379 | + |
| 380 | + // Sleep briefly to avoid busy loop |
| 381 | + std::thread::sleep(std::time::Duration::from_millis(10)); |
| 382 | + } |
| 383 | + } |
| 384 | + } |
| 385 | + |
| 386 | + tracing::info!("Screen locker exiting"); |
| 387 | + Ok(()) |
| 388 | +} |