| 1 | //! ers — window border renderer |
| 2 | |
| 3 | mod events; |
| 4 | mod skylight; |
| 5 | |
| 6 | use events::Event; |
| 7 | use skylight::*; |
| 8 | use std::collections::HashMap; |
| 9 | use std::ptr; |
| 10 | use std::sync::atomic::{AtomicBool, Ordering}; |
| 11 | use std::sync::mpsc; |
| 12 | use std::sync::Arc; |
| 13 | use tracing::debug; |
| 14 | |
| 15 | /// Per-overlay state: the connection it was created on + its wid. |
| 16 | struct Overlay { |
| 17 | cid: CGSConnectionID, |
| 18 | wid: u32, |
| 19 | } |
| 20 | |
| 21 | /// Tracks overlays for target windows. |
| 22 | struct BorderMap { |
| 23 | overlays: HashMap<u32, Overlay>, |
| 24 | main_cid: CGSConnectionID, |
| 25 | own_pid: i32, |
| 26 | border_width: f64, |
| 27 | radius: f64, |
| 28 | focused_wid: u32, |
| 29 | active_color: (f64, f64, f64, f64), |
| 30 | inactive_color: (f64, f64, f64, f64), |
| 31 | active_only: bool, |
| 32 | } |
| 33 | |
| 34 | impl BorderMap { |
| 35 | fn new(cid: CGSConnectionID, own_pid: i32, border_width: f64) -> Self { |
| 36 | Self { |
| 37 | overlays: HashMap::new(), |
| 38 | main_cid: cid, |
| 39 | own_pid, |
| 40 | border_width, |
| 41 | radius: 10.0, |
| 42 | focused_wid: 0, |
| 43 | active_color: (0.32, 0.58, 0.89, 1.0), // #5294e2 |
| 44 | inactive_color: (0.35, 0.35, 0.35, 0.8), // dim gray |
| 45 | active_only: false, |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | fn color_for(&self, target_wid: u32) -> (f64, f64, f64, f64) { |
| 50 | if target_wid == self.focused_wid { self.active_color } else { self.inactive_color } |
| 51 | } |
| 52 | |
| 53 | fn is_overlay(&self, wid: u32) -> bool { |
| 54 | self.overlays.values().any(|o| o.wid == wid) |
| 55 | } |
| 56 | |
| 57 | /// Add border (batch mode, uses main cid). |
| 58 | fn add_batch(&mut self, target_wid: u32) { |
| 59 | if self.overlays.contains_key(&target_wid) { return; } |
| 60 | let color = self.color_for(target_wid); |
| 61 | if let Some((cid, wid)) = create_overlay(self.main_cid, target_wid, self.border_width, self.radius, color) { |
| 62 | self.overlays.insert(target_wid, Overlay { cid, wid }); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /// Add border (event mode). Uses main_cid — fresh connections create |
| 67 | /// invisible windows on Tahoe. |
| 68 | fn add_fresh(&mut self, target_wid: u32) { |
| 69 | if self.overlays.contains_key(&target_wid) { return; } |
| 70 | |
| 71 | // Filter: must be visible, owned by another process, not tiny |
| 72 | unsafe { |
| 73 | let mut shown = false; |
| 74 | SLSWindowIsOrderedIn(self.main_cid, target_wid, &mut shown); |
| 75 | if !shown { return; } |
| 76 | |
| 77 | let mut wid_cid: CGSConnectionID = 0; |
| 78 | SLSGetWindowOwner(self.main_cid, target_wid, &mut wid_cid); |
| 79 | let mut pid: i32 = 0; |
| 80 | SLSConnectionGetPID(wid_cid, &mut pid); |
| 81 | if pid == self.own_pid { return; } |
| 82 | |
| 83 | let mut bounds = CGRect::default(); |
| 84 | SLSGetWindowBounds(self.main_cid, target_wid, &mut bounds); |
| 85 | if bounds.size.width < 50.0 || bounds.size.height < 50.0 { return; } |
| 86 | } |
| 87 | |
| 88 | let color = self.color_for(target_wid); |
| 89 | if let Some((cid, wid)) = create_overlay(self.main_cid, target_wid, self.border_width, self.radius, color) { |
| 90 | self.overlays.insert(target_wid, Overlay { cid, wid }); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | fn remove_all(&mut self) { |
| 95 | let wids: Vec<u32> = self.overlays.keys().copied().collect(); |
| 96 | for wid in wids { |
| 97 | self.remove(wid); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | fn remove(&mut self, target_wid: u32) { |
| 102 | if let Some(overlay) = self.overlays.remove(&target_wid) { |
| 103 | unsafe { |
| 104 | // Move off-screen first (most reliable hide on Tahoe) |
| 105 | let offscreen = CGPoint { x: -99999.0, y: -99999.0 }; |
| 106 | SLSMoveWindow(overlay.cid, overlay.wid, &offscreen); |
| 107 | SLSSetWindowAlpha(overlay.cid, overlay.wid, 0.0); |
| 108 | SLSOrderWindow(overlay.cid, overlay.wid, 0, 0); |
| 109 | SLSReleaseWindow(overlay.cid, overlay.wid); |
| 110 | if overlay.cid != self.main_cid { |
| 111 | SLSReleaseConnection(overlay.cid); |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /// Move overlay to match target's current position (no recreate). |
| 118 | fn reposition(&self, target_wid: u32) { |
| 119 | if let Some(overlay) = self.overlays.get(&target_wid) { |
| 120 | unsafe { |
| 121 | let mut bounds = CGRect::default(); |
| 122 | if SLSGetWindowBounds(overlay.cid, target_wid, &mut bounds) != kCGErrorSuccess { |
| 123 | return; |
| 124 | } |
| 125 | let bw = self.border_width; |
| 126 | let origin = CGPoint { |
| 127 | x: bounds.origin.x - bw, |
| 128 | y: bounds.origin.y - bw, |
| 129 | }; |
| 130 | SLSMoveWindow(overlay.cid, overlay.wid, &origin); |
| 131 | } |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | /// Recreate overlay at new size. |
| 136 | fn recreate(&mut self, target_wid: u32) { |
| 137 | if !self.overlays.contains_key(&target_wid) { return; } |
| 138 | self.remove(target_wid); |
| 139 | self.add_fresh(target_wid); |
| 140 | if self.active_only && target_wid != self.focused_wid { |
| 141 | self.hide(target_wid); |
| 142 | } |
| 143 | self.subscribe_target(target_wid); |
| 144 | } |
| 145 | |
| 146 | fn hide(&self, target_wid: u32) { |
| 147 | if let Some(o) = self.overlays.get(&target_wid) { |
| 148 | unsafe { SLSOrderWindow(o.cid, o.wid, 0, 0); } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | fn unhide(&self, target_wid: u32) { |
| 153 | if let Some(o) = self.overlays.get(&target_wid) { |
| 154 | unsafe { |
| 155 | SLSSetWindowLevel(o.cid, o.wid, 25); |
| 156 | SLSOrderWindow(o.cid, o.wid, 1, 0); |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | fn subscribe_target(&self, target_wid: u32) { |
| 162 | unsafe { |
| 163 | SLSRequestNotificationsForWindows(self.main_cid, &target_wid, 1); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | fn subscribe_all(&self) { |
| 168 | let target_wids: Vec<u32> = self.overlays.keys().copied().collect(); |
| 169 | if target_wids.is_empty() { return; } |
| 170 | unsafe { |
| 171 | SLSRequestNotificationsForWindows( |
| 172 | self.main_cid, |
| 173 | target_wids.as_ptr(), |
| 174 | target_wids.len() as i32, |
| 175 | ); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /// Redraw an existing overlay with a new color (no destroy/recreate). |
| 180 | fn redraw(&self, target_wid: u32) { |
| 181 | if let Some(overlay) = self.overlays.get(&target_wid) { |
| 182 | unsafe { |
| 183 | let mut bounds = CGRect::default(); |
| 184 | if SLSGetWindowBounds(overlay.cid, target_wid, &mut bounds) != kCGErrorSuccess { |
| 185 | return; |
| 186 | } |
| 187 | let bw = self.border_width; |
| 188 | let ow = bounds.size.width + 2.0 * bw; |
| 189 | let oh = bounds.size.height + 2.0 * bw; |
| 190 | |
| 191 | let ctx = SLWindowContextCreate(overlay.cid, overlay.wid, ptr::null()); |
| 192 | if ctx.is_null() { return; } |
| 193 | |
| 194 | let color = self.color_for(target_wid); |
| 195 | draw_border(ctx, ow, oh, bw, self.radius, color); |
| 196 | SLSFlushWindowContentRegion(overlay.cid, overlay.wid, ptr::null()); |
| 197 | CGContextRelease(ctx); |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /// Detect focused window and update border colors if focus changed. |
| 203 | fn update_focus(&mut self) { |
| 204 | let front = get_front_window(self.own_pid); |
| 205 | if front == 0 || front == self.focused_wid { return; } |
| 206 | |
| 207 | let old = self.focused_wid; |
| 208 | self.focused_wid = front; |
| 209 | debug!("[focus] {} -> {}", old, front); |
| 210 | |
| 211 | if self.active_only { |
| 212 | self.hide(old); |
| 213 | self.unhide(front); |
| 214 | } |
| 215 | self.redraw(old); |
| 216 | self.redraw(front); |
| 217 | } |
| 218 | |
| 219 | /// In active-only mode, ensure only the focused overlay is visible. |
| 220 | fn enforce_active_only(&self) { |
| 221 | if !self.active_only { return; } |
| 222 | for (&target_wid, o) in &self.overlays { |
| 223 | if target_wid == self.focused_wid { |
| 224 | unsafe { |
| 225 | SLSSetWindowLevel(o.cid, o.wid, 25); |
| 226 | SLSOrderWindow(o.cid, o.wid, 1, 0); |
| 227 | } |
| 228 | } else { |
| 229 | unsafe { SLSOrderWindow(o.cid, o.wid, 0, 0); } |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /// Get the front (focused) window ID using CGWindowListCopyWindowInfo. |
| 236 | /// Avoids all SLS display/space queries which poison SLSNewWindow globally. |
| 237 | fn get_front_window(own_pid: i32) -> u32 { |
| 238 | unsafe { |
| 239 | let list = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID); |
| 240 | if list.is_null() { return 0; } |
| 241 | |
| 242 | let count = CFArrayGetCount(list); |
| 243 | let wid_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowNumber\0".as_ptr(), kCFStringEncodingUTF8); |
| 244 | let pid_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowOwnerPID\0".as_ptr(), kCFStringEncodingUTF8); |
| 245 | let layer_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowLayer\0".as_ptr(), kCFStringEncodingUTF8); |
| 246 | |
| 247 | // CGWindowListCopyWindowInfo returns windows in front-to-back order. |
| 248 | // First layer-0 window not owned by us is the focused window. |
| 249 | let mut front_wid: u32 = 0; |
| 250 | for i in 0..count { |
| 251 | let dict = CFArrayGetValueAtIndex(list, i); |
| 252 | if dict.is_null() { continue; } |
| 253 | |
| 254 | let mut v: CFTypeRef = ptr::null(); |
| 255 | |
| 256 | let mut layer: i32 = -1; |
| 257 | if CFDictionaryGetValueIfPresent(dict, layer_key as CFTypeRef, &mut v) { |
| 258 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut layer as *mut _ as *mut _); |
| 259 | } |
| 260 | if layer != 0 { continue; } |
| 261 | |
| 262 | let mut pid: i32 = 0; |
| 263 | if CFDictionaryGetValueIfPresent(dict, pid_key as CFTypeRef, &mut v) { |
| 264 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut pid as *mut _ as *mut _); |
| 265 | } |
| 266 | if pid == own_pid { continue; } |
| 267 | |
| 268 | let mut wid: u32 = 0; |
| 269 | if CFDictionaryGetValueIfPresent(dict, wid_key as CFTypeRef, &mut v) { |
| 270 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut wid as *mut _ as *mut _); |
| 271 | } |
| 272 | if wid != 0 { |
| 273 | front_wid = wid; |
| 274 | break; |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | CFRelease(wid_key as CFTypeRef); |
| 279 | CFRelease(pid_key as CFTypeRef); |
| 280 | CFRelease(layer_key as CFTypeRef); |
| 281 | CFRelease(list); |
| 282 | front_wid |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | /// Parse hex color string (#RRGGBB or #RRGGBBAA) to (r, g, b, a) floats. |
| 287 | fn parse_color(s: &str) -> Option<(f64, f64, f64, f64)> { |
| 288 | let hex = s.strip_prefix('#').unwrap_or(s); |
| 289 | if hex.len() != 6 && hex.len() != 8 { return None; } |
| 290 | let r = u8::from_str_radix(&hex[0..2], 16).ok()? as f64 / 255.0; |
| 291 | let g = u8::from_str_radix(&hex[2..4], 16).ok()? as f64 / 255.0; |
| 292 | let b = u8::from_str_radix(&hex[4..6], 16).ok()? as f64 / 255.0; |
| 293 | let a = if hex.len() == 8 { |
| 294 | u8::from_str_radix(&hex[6..8], 16).ok()? as f64 / 255.0 |
| 295 | } else { 1.0 }; |
| 296 | Some((r, g, b, a)) |
| 297 | } |
| 298 | |
| 299 | fn flag_value<'a>(args: &'a [String], flags: &[&str]) -> Option<&'a str> { |
| 300 | args.iter() |
| 301 | .position(|s| flags.iter().any(|f| s == f)) |
| 302 | .and_then(|i| args.get(i + 1)) |
| 303 | .map(|s| s.as_str()) |
| 304 | } |
| 305 | |
| 306 | fn print_help() { |
| 307 | eprintln!("ers — window border renderer for tarmac"); |
| 308 | eprintln!(); |
| 309 | eprintln!("USAGE: ers [OPTIONS] [WINDOW_ID]"); |
| 310 | eprintln!(); |
| 311 | eprintln!("OPTIONS:"); |
| 312 | eprintln!(" -w, --width <PX> Border width in pixels (default: 4.0)"); |
| 313 | eprintln!(" -r, --radius <PX> Corner radius (default: 10.0)"); |
| 314 | eprintln!(" -c, --color <HEX> Active border color (default: #5294e2)"); |
| 315 | eprintln!(" -i, --inactive <HEX> Inactive border color (default: #59595980)"); |
| 316 | eprintln!(" --active-only Only show border on focused window"); |
| 317 | eprintln!(" --list List on-screen windows and exit"); |
| 318 | eprintln!(" -h, --help Show this help"); |
| 319 | } |
| 320 | |
| 321 | fn main() { |
| 322 | tracing_subscriber::fmt() |
| 323 | .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) |
| 324 | .with_writer(std::io::stderr) |
| 325 | .init(); |
| 326 | |
| 327 | let args: Vec<String> = std::env::args().collect(); |
| 328 | |
| 329 | if args.iter().any(|s| s == "--help" || s == "-h") { |
| 330 | print_help(); |
| 331 | return; |
| 332 | } |
| 333 | |
| 334 | if args.get(1).is_some_and(|s| s == "--list") { |
| 335 | list_windows(); |
| 336 | return; |
| 337 | } |
| 338 | |
| 339 | let border_width: f64 = flag_value(&args, &["--width", "-w"]) |
| 340 | .and_then(|v| v.parse().ok()) |
| 341 | .unwrap_or(4.0); |
| 342 | |
| 343 | let radius: f64 = flag_value(&args, &["--radius", "-r"]) |
| 344 | .and_then(|v| v.parse().ok()) |
| 345 | .unwrap_or(10.0); |
| 346 | |
| 347 | let active_color = flag_value(&args, &["--color", "-c"]) |
| 348 | .and_then(parse_color) |
| 349 | .unwrap_or((0.32, 0.58, 0.89, 1.0)); |
| 350 | |
| 351 | let inactive_color = flag_value(&args, &["--inactive", "-i"]) |
| 352 | .and_then(parse_color) |
| 353 | .unwrap_or((0.35, 0.35, 0.35, 0.8)); |
| 354 | |
| 355 | let active_only = args.iter().any(|s| s == "--active-only"); |
| 356 | |
| 357 | let cid = unsafe { SLSMainConnectionID() }; |
| 358 | let own_pid = unsafe { |
| 359 | let mut pid: i32 = 0; |
| 360 | pid_for_task(mach_task_self(), &mut pid); |
| 361 | pid |
| 362 | }; |
| 363 | |
| 364 | // Event channel |
| 365 | let (tx, rx) = mpsc::channel(); |
| 366 | events::init(tx, own_pid); |
| 367 | events::register(cid); |
| 368 | setup_event_port(cid); |
| 369 | |
| 370 | // Discover and create borders |
| 371 | let mut borders = BorderMap::new(cid, own_pid, border_width); |
| 372 | borders.radius = radius; |
| 373 | borders.active_color = active_color; |
| 374 | borders.inactive_color = inactive_color; |
| 375 | borders.active_only = active_only; |
| 376 | |
| 377 | if let Some(target) = args.get(1).and_then(|s| s.parse::<u32>().ok()) { |
| 378 | borders.add_batch(target); |
| 379 | } else { |
| 380 | let wids = discover_windows(cid, own_pid); |
| 381 | for &wid in &wids { |
| 382 | borders.add_batch(wid); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | borders.subscribe_all(); |
| 387 | |
| 388 | borders.update_focus(); |
| 389 | |
| 390 | if borders.active_only { |
| 391 | let focused = borders.focused_wid; |
| 392 | let to_hide: Vec<u32> = borders.overlays.keys() |
| 393 | .filter(|&&wid| wid != focused) |
| 394 | .copied() |
| 395 | .collect(); |
| 396 | for wid in to_hide { |
| 397 | borders.hide(wid); |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | debug!("{} overlays tracked", borders.overlays.len()); |
| 402 | |
| 403 | // SIGINT flag — background thread checks this to clean up |
| 404 | let running = Arc::new(AtomicBool::new(true)); |
| 405 | unsafe { |
| 406 | libc::signal(libc::SIGINT, { |
| 407 | unsafe extern "C" fn handler(_: libc::c_int) { |
| 408 | unsafe { |
| 409 | CFRunLoopStop(CFRunLoopGetMain()); |
| 410 | } |
| 411 | } |
| 412 | handler as *const () as libc::sighandler_t |
| 413 | }); |
| 414 | } |
| 415 | |
| 416 | // Process events on background thread with coalescing |
| 417 | let running_bg = Arc::clone(&running); |
| 418 | let handle = std::thread::spawn(move || { |
| 419 | use std::collections::HashSet; |
| 420 | use std::time::Duration; |
| 421 | |
| 422 | // Persist across batches: windows we know about but haven't bordered yet |
| 423 | let mut pending: HashSet<u32> = HashSet::new(); |
| 424 | |
| 425 | while running_bg.load(Ordering::Relaxed) { |
| 426 | let first = match rx.recv_timeout(Duration::from_millis(100)) { |
| 427 | Ok(e) => e, |
| 428 | Err(mpsc::RecvTimeoutError::Timeout) => continue, |
| 429 | Err(mpsc::RecvTimeoutError::Disconnected) => break, |
| 430 | }; |
| 431 | |
| 432 | std::thread::sleep(std::time::Duration::from_millis(16)); |
| 433 | |
| 434 | let mut events = vec![first]; |
| 435 | while let Ok(e) = rx.try_recv() { |
| 436 | events.push(e); |
| 437 | } |
| 438 | |
| 439 | let mut moved: HashSet<u32> = HashSet::new(); |
| 440 | let mut resized: HashSet<u32> = HashSet::new(); |
| 441 | let mut destroyed: HashSet<u32> = HashSet::new(); |
| 442 | let mut needs_resubscribe = false; |
| 443 | |
| 444 | for event in events { |
| 445 | match event { |
| 446 | Event::Move(wid) => { |
| 447 | if !borders.is_overlay(wid) { |
| 448 | moved.insert(wid); |
| 449 | } |
| 450 | } |
| 451 | Event::Resize(wid) => { |
| 452 | if !borders.is_overlay(wid) { |
| 453 | resized.insert(wid); |
| 454 | } |
| 455 | } |
| 456 | Event::Close(wid) | Event::Destroy(wid) => { |
| 457 | if !borders.is_overlay(wid) { |
| 458 | destroyed.insert(wid); |
| 459 | pending.remove(&wid); |
| 460 | } |
| 461 | } |
| 462 | Event::Create(wid) => { |
| 463 | if !borders.is_overlay(wid) { |
| 464 | pending.insert(wid); |
| 465 | borders.subscribe_target(wid); |
| 466 | } |
| 467 | } |
| 468 | Event::Hide(wid) => borders.hide(wid), |
| 469 | Event::Unhide(wid) => { |
| 470 | if !borders.active_only || wid == borders.focused_wid { |
| 471 | borders.unhide(wid); |
| 472 | } |
| 473 | } |
| 474 | Event::FrontChange => { |
| 475 | needs_resubscribe = true; |
| 476 | } |
| 477 | Event::SpaceChange => { |
| 478 | needs_resubscribe = true; |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | // Destroys |
| 484 | for wid in &destroyed { |
| 485 | borders.remove(*wid); |
| 486 | } |
| 487 | |
| 488 | // Promote ALL pending creates that weren't destroyed |
| 489 | // (the 150ms debounce is enough for tarmac to position them) |
| 490 | let ready: Vec<u32> = pending.iter() |
| 491 | .filter(|wid| !destroyed.contains(wid)) |
| 492 | .copied() |
| 493 | .collect(); |
| 494 | // Filter overlapping creates: if two windows overlap, keep smaller one |
| 495 | let mut bounds_map: Vec<(u32, CGRect)> = Vec::new(); |
| 496 | for &wid in &ready { |
| 497 | unsafe { |
| 498 | let mut b = CGRect::default(); |
| 499 | SLSGetWindowBounds(borders.main_cid, wid, &mut b); |
| 500 | bounds_map.push((wid, b)); |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | // If two new windows overlap closely, skip the larger one (container) |
| 505 | let mut skip: std::collections::HashSet<u32> = HashSet::new(); |
| 506 | for i in 0..bounds_map.len() { |
| 507 | for j in (i+1)..bounds_map.len() { |
| 508 | let (wid_a, a) = &bounds_map[i]; |
| 509 | let (wid_b, b) = &bounds_map[j]; |
| 510 | // Check if centers are close (within 30px) |
| 511 | let cx_a = a.origin.x + a.size.width / 2.0; |
| 512 | let cy_a = a.origin.y + a.size.height / 2.0; |
| 513 | let cx_b = b.origin.x + b.size.width / 2.0; |
| 514 | let cy_b = b.origin.y + b.size.height / 2.0; |
| 515 | if (cx_a - cx_b).abs() < 30.0 && (cy_a - cy_b).abs() < 30.0 { |
| 516 | // Skip the larger one |
| 517 | let area_a = a.size.width * a.size.height; |
| 518 | let area_b = b.size.width * b.size.height; |
| 519 | if area_a > area_b { |
| 520 | skip.insert(*wid_a); |
| 521 | } else { |
| 522 | skip.insert(*wid_b); |
| 523 | } |
| 524 | } |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | for &wid in &ready { |
| 529 | pending.remove(&wid); |
| 530 | if !skip.contains(&wid) { |
| 531 | borders.add_fresh(wid); |
| 532 | if borders.active_only && wid != borders.focused_wid { |
| 533 | borders.hide(wid); |
| 534 | } |
| 535 | needs_resubscribe = true; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | // Moves: reposition overlay (no destroy/create) |
| 540 | for wid in &moved { |
| 541 | if !resized.contains(wid) && !ready.contains(wid) { |
| 542 | borders.reposition(*wid); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | // Resizes: must recreate (can't reshape windows on Tahoe) |
| 547 | // Skip windows just created this batch — already at correct size |
| 548 | for wid in &resized { |
| 549 | if !ready.contains(wid) && borders.overlays.contains_key(wid) { |
| 550 | borders.recreate(*wid); |
| 551 | needs_resubscribe = true; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | // Update focus (redraws borders in-place if changed) |
| 556 | borders.update_focus(); |
| 557 | |
| 558 | // Re-subscribe ALL tracked windows (SLSRequestNotificationsForWindows replaces, not appends) |
| 559 | if needs_resubscribe || !destroyed.is_empty() { |
| 560 | borders.subscribe_all(); |
| 561 | } |
| 562 | |
| 563 | // After all processing, enforce active-only visibility |
| 564 | borders.enforce_active_only(); |
| 565 | } |
| 566 | |
| 567 | // Clean up all overlays before exiting |
| 568 | borders.remove_all(); |
| 569 | }); |
| 570 | |
| 571 | unsafe { CFRunLoopRun() }; |
| 572 | |
| 573 | // SIGINT received — signal background thread to stop and wait |
| 574 | running.store(false, Ordering::Relaxed); |
| 575 | let _ = handle.join(); |
| 576 | } |
| 577 | |
| 578 | fn setup_event_port(cid: CGSConnectionID) { |
| 579 | unsafe { |
| 580 | let mut port: u32 = 0; |
| 581 | if SLSGetEventPort(cid, &mut port) != kCGErrorSuccess { return; } |
| 582 | let cf_port = CFMachPortCreateWithPort(ptr::null(), port, drain_events as *const _, ptr::null(), false); |
| 583 | if cf_port.is_null() { return; } |
| 584 | _CFMachPortSetOptions(cf_port, 0x40); |
| 585 | let source = CFMachPortCreateRunLoopSource(ptr::null(), cf_port, 0); |
| 586 | if !source.is_null() { |
| 587 | CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopDefaultMode); |
| 588 | CFRelease(source); |
| 589 | } |
| 590 | CFRelease(cf_port); |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | unsafe extern "C" fn drain_events(_: CFMachPortRef, _: *mut std::ffi::c_void, _: i64, _: *mut std::ffi::c_void) { |
| 595 | unsafe { |
| 596 | let cid = SLSMainConnectionID(); |
| 597 | let mut ev = SLEventCreateNextEvent(cid); |
| 598 | while !ev.is_null() { |
| 599 | CFRelease(ev as CFTypeRef); |
| 600 | ev = SLEventCreateNextEvent(cid); |
| 601 | } |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | fn discover_windows(_cid: CGSConnectionID, own_pid: i32) -> Vec<u32> { |
| 606 | unsafe { |
| 607 | let list = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID); |
| 608 | if list.is_null() { return vec![]; } |
| 609 | |
| 610 | let count = CFArrayGetCount(list); |
| 611 | let wid_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowNumber\0".as_ptr(), kCFStringEncodingUTF8); |
| 612 | let pid_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowOwnerPID\0".as_ptr(), kCFStringEncodingUTF8); |
| 613 | let layer_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowLayer\0".as_ptr(), kCFStringEncodingUTF8); |
| 614 | |
| 615 | let mut wids = Vec::new(); |
| 616 | for i in 0..count { |
| 617 | let dict = CFArrayGetValueAtIndex(list, i); |
| 618 | if dict.is_null() { continue; } |
| 619 | |
| 620 | let mut v: CFTypeRef = ptr::null(); |
| 621 | let mut wid: u32 = 0; |
| 622 | if CFDictionaryGetValueIfPresent(dict, wid_key as CFTypeRef, &mut v) { |
| 623 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut wid as *mut _ as *mut _); |
| 624 | } |
| 625 | if wid == 0 { continue; } |
| 626 | |
| 627 | let mut pid: i32 = 0; |
| 628 | if CFDictionaryGetValueIfPresent(dict, pid_key as CFTypeRef, &mut v) { |
| 629 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut pid as *mut _ as *mut _); |
| 630 | } |
| 631 | if pid == own_pid { continue; } |
| 632 | |
| 633 | let mut layer: i32 = -1; |
| 634 | if CFDictionaryGetValueIfPresent(dict, layer_key as CFTypeRef, &mut v) { |
| 635 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut layer as *mut _ as *mut _); |
| 636 | } |
| 637 | if layer != 0 { continue; } |
| 638 | |
| 639 | wids.push(wid); |
| 640 | } |
| 641 | |
| 642 | CFRelease(wid_key as CFTypeRef); |
| 643 | CFRelease(pid_key as CFTypeRef); |
| 644 | CFRelease(layer_key as CFTypeRef); |
| 645 | CFRelease(list); |
| 646 | wids |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | /// Draw a border ring into an existing CGContext, clearing first. |
| 651 | fn draw_border( |
| 652 | ctx: CGContextRef, |
| 653 | width: f64, |
| 654 | height: f64, |
| 655 | border_width: f64, |
| 656 | radius: f64, |
| 657 | color: (f64, f64, f64, f64), |
| 658 | ) { |
| 659 | unsafe { |
| 660 | let full = CGRect::new(0.0, 0.0, width, height); |
| 661 | CGContextClearRect(ctx, full); |
| 662 | |
| 663 | let bw = border_width; |
| 664 | let stroke_rect = CGRect::new(bw / 2.0, bw / 2.0, width - bw, height - bw); |
| 665 | let max_r = (stroke_rect.size.width.min(stroke_rect.size.height) / 2.0).max(0.0); |
| 666 | let r = radius.min(max_r); |
| 667 | |
| 668 | CGContextSetRGBStrokeColor(ctx, color.0, color.1, color.2, color.3); |
| 669 | CGContextSetLineWidth(ctx, bw); |
| 670 | let path = CGPathCreateWithRoundedRect(stroke_rect, r, r, ptr::null()); |
| 671 | if !path.is_null() { |
| 672 | CGContextAddPath(ctx, path); |
| 673 | CGContextStrokePath(ctx); |
| 674 | CGPathRelease(path); |
| 675 | } |
| 676 | CGContextFlush(ctx); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | fn create_overlay( |
| 681 | cid: CGSConnectionID, |
| 682 | target_wid: u32, |
| 683 | border_width: f64, |
| 684 | radius: f64, |
| 685 | color: (f64, f64, f64, f64), |
| 686 | ) -> Option<(CGSConnectionID, u32)> { |
| 687 | unsafe { |
| 688 | let mut bounds = CGRect::default(); |
| 689 | let rc = SLSGetWindowBounds(cid, target_wid, &mut bounds); |
| 690 | if rc != kCGErrorSuccess { |
| 691 | debug!("[create_overlay] SLSGetWindowBounds failed for wid={target_wid} rc={rc}"); |
| 692 | return None; |
| 693 | } |
| 694 | if bounds.size.width < 10.0 || bounds.size.height < 10.0 { |
| 695 | debug!("[create_overlay] wid={target_wid} too small: {}x{}", bounds.size.width, bounds.size.height); |
| 696 | return None; |
| 697 | } |
| 698 | |
| 699 | let bw = border_width; |
| 700 | let ow = bounds.size.width + 2.0 * bw; |
| 701 | let oh = bounds.size.height + 2.0 * bw; |
| 702 | let ox = bounds.origin.x - bw; |
| 703 | let oy = bounds.origin.y - bw; |
| 704 | |
| 705 | let frame = CGRect::new(0.0, 0.0, ow, oh); |
| 706 | let mut region: CFTypeRef = ptr::null(); |
| 707 | CGSNewRegionWithRect(&frame, &mut region); |
| 708 | if region.is_null() { |
| 709 | debug!("[create_overlay] CGSNewRegionWithRect failed for wid={target_wid}"); |
| 710 | return None; |
| 711 | } |
| 712 | |
| 713 | let mut wid: u32 = 0; |
| 714 | SLSNewWindow(cid, 2, ox as f32, oy as f32, region, &mut wid); |
| 715 | CFRelease(region); |
| 716 | if wid == 0 { |
| 717 | debug!("[create_overlay] SLSNewWindow returned 0 for target={target_wid} cid={cid}"); |
| 718 | return None; |
| 719 | } |
| 720 | |
| 721 | debug!("[create_overlay] created overlay wid={wid} for target={target_wid} color=({:.2},{:.2},{:.2},{:.2})", |
| 722 | color.0, color.1, color.2, color.3); |
| 723 | |
| 724 | SLSSetWindowResolution(cid, wid, 2.0); |
| 725 | SLSSetWindowOpacity(cid, wid, false); |
| 726 | SLSSetWindowLevel(cid, wid, 25); |
| 727 | SLSOrderWindow(cid, wid, 1, 0); |
| 728 | |
| 729 | // Draw border (point coordinates) |
| 730 | let ctx = SLWindowContextCreate(cid, wid, ptr::null()); |
| 731 | if ctx.is_null() { |
| 732 | debug!("[create_overlay] SLWindowContextCreate returned null for overlay wid={wid}"); |
| 733 | SLSReleaseWindow(cid, wid); |
| 734 | return None; |
| 735 | } |
| 736 | |
| 737 | draw_border(ctx, ow, oh, bw, radius, color); |
| 738 | SLSFlushWindowContentRegion(cid, wid, ptr::null()); |
| 739 | CGContextRelease(ctx); |
| 740 | |
| 741 | Some((cid, wid)) |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | fn list_windows() { |
| 746 | let cid = unsafe { SLSMainConnectionID() }; |
| 747 | unsafe { |
| 748 | let list = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID); |
| 749 | if list.is_null() { return; } |
| 750 | let count = CFArrayGetCount(list); |
| 751 | let wid_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowNumber\0".as_ptr(), kCFStringEncodingUTF8); |
| 752 | let layer_key = CFStringCreateWithCString(ptr::null(), b"kCGWindowLayer\0".as_ptr(), kCFStringEncodingUTF8); |
| 753 | |
| 754 | eprintln!("{:>6} {:>8} {:>8} {:>6} {:>6}", "wid", "x", "y", "w", "h"); |
| 755 | for i in 0..count { |
| 756 | let dict = CFArrayGetValueAtIndex(list, i); |
| 757 | if dict.is_null() { continue; } |
| 758 | |
| 759 | let mut v: CFTypeRef = ptr::null(); |
| 760 | let mut wid: u32 = 0; |
| 761 | let mut layer: i32 = -1; |
| 762 | if CFDictionaryGetValueIfPresent(dict, wid_key as CFTypeRef, &mut v) { |
| 763 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut wid as *mut _ as *mut _); |
| 764 | } |
| 765 | if CFDictionaryGetValueIfPresent(dict, layer_key as CFTypeRef, &mut v) { |
| 766 | CFNumberGetValue(v, kCFNumberSInt32Type, &mut layer as *mut _ as *mut _); |
| 767 | } |
| 768 | if layer != 0 || wid == 0 { continue; } |
| 769 | |
| 770 | let mut bounds = CGRect::default(); |
| 771 | SLSGetWindowBounds(cid, wid, &mut bounds); |
| 772 | eprintln!("{wid:>6} {:>8.0} {:>8.0} {:>6.0} {:>6.0}", |
| 773 | bounds.origin.x, bounds.origin.y, bounds.size.width, bounds.size.height); |
| 774 | } |
| 775 | CFRelease(wid_key as CFTypeRef); |
| 776 | CFRelease(layer_key as CFTypeRef); |
| 777 | CFRelease(list); |
| 778 | } |
| 779 | } |
| 780 | |
| 781 |