()
| 329 | |
| 330 | #[no_mangle] |
| 331 | fn main() { |
| 332 | let args: Vec<String> = env::args().collect(); |
| 333 | |
| 334 | if args.len() != 2 { |
| 335 | print!("Usage: {} <file>", args[0]); |
| 336 | return; |
| 337 | } |
| 338 | let file_path = &args[1]; |
| 339 | |
| 340 | let mut file = File::open(file_path); |
| 341 | |
| 342 | display(&file); |
| 343 | loop { |
| 344 | match syscalls::receive(&syscalls::STDIN) { |
| 345 | Ok(syscalls::Message::Short( |
| 346 | message::CHAR, ch, _)) => { |
| 347 | // Received a character |
| 348 | |
| 349 | if ch == 8 { |
| 350 | // Backspace |
| 351 | if file.cursor.pos == 0 { |
| 352 | // Shorten the piece before this |
| 353 | if file.cursor.piece == 0 { |
| 354 | continue; // no-op |
| 355 | } |
| 356 | let piece = file.pieces[file.cursor.piece - 1]; |
| 357 | match piece { |
| 358 | Piece::Original{start: start, |
| 359 | len: len} => { |
| 360 | if len == 1 { |
| 361 | // Remove the piece |
| 362 | file.pieces.remove(file.cursor.piece - 1); |
| 363 | file.cursor.piece -= 1; |
| 364 | } else { |
| 365 | file.pieces[file.cursor.piece - 1] = Piece::Original{ |
| 366 | start: start, |
| 367 | len: len - 1}; |
| 368 | } |
| 369 | }, |
| 370 | Piece::Add{start: start, |
| 371 | len: len} => { |
| 372 | if len == 1 { |
| 373 | // Remove the piece |
| 374 | file.pieces.remove(file.cursor.piece - 1); |
| 375 | file.cursor.piece -= 1; |
| 376 | } else { |
| 377 | file.pieces[file.cursor.piece - 1] = Piece::Add{ |
| 378 | start: start, |
| 379 | len: len - 1}; |
| 380 | } |
| 381 | }, |
| 382 | } |
| 383 | } else if file.cursor.pos == 1 { |
| 384 | // Shorten this piece |
| 385 | let piece = file.pieces[file.cursor.piece]; |
| 386 | match piece { |
| 387 | Piece::Original{start: start, |
| 388 | len: len} => { |
nothing calls this directly
no test coverage detected