(self)
| 378 | |
| 379 | class transpose_characters(EditCommand): |
| 380 | def do(self) -> None: |
| 381 | r = self.reader |
| 382 | b = r.buffer |
| 383 | s = r.pos - 1 |
| 384 | if s < 0: |
| 385 | r.error("cannot transpose at start of buffer") |
| 386 | else: |
| 387 | if s == len(b): |
| 388 | s -= 1 |
| 389 | t = min(s + r.get_arg(), len(b) - 1) |
| 390 | c = b[s] |
| 391 | del b[s] |
| 392 | b.insert(t, c) |
| 393 | r.pos = t |
| 394 | r.dirty = True |
| 395 | |
| 396 | |
| 397 | class backspace(EditCommand): |