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| 1 | <?php declare(strict_types=1); |
| 2 | |
| 3 | namespace Aviat\Kilo; |
| 4 | |
| 5 | use Aviat\Kilo\Type\TerminalSize; |
| 6 | use Aviat\Kilo\Enum\{ |
| 7 | Color, |
| 8 | RawKeyCode, |
| 9 | KeyType, |
| 10 | Highlight, |
| 11 | SearchDirection |
| 12 | }; |
| 13 | use Aviat\Kilo\Type\{Point, StatusMessage}; |
| 14 | |
| 15 | /** |
| 16 | * // Don't highlight this! |
| 17 | */ |
| 18 | class Editor { |
| 19 | /** |
| 20 | * @var string The screen buffer |
| 21 | */ |
| 22 | private string $outputBuffer = ''; |
| 23 | |
| 24 | /** |
| 25 | * @var Point The 0-based location of the cursor in the current viewport |
| 26 | */ |
| 27 | protected Point $cursor; |
| 28 | |
| 29 | /** |
| 30 | * @var Point The scroll offset of the file in the current viewport |
| 31 | */ |
| 32 | protected Point $offset; |
| 33 | |
| 34 | /** |
| 35 | * @var Document The document being edited |
| 36 | */ |
| 37 | protected Document $document; |
| 38 | |
| 39 | /** |
| 40 | * @var StatusMessage A disappearing status message |
| 41 | */ |
| 42 | protected StatusMessage $statusMessage; |
| 43 | |
| 44 | /** |
| 45 | * @var TerminalSize The size of the terminal in rows and columns |
| 46 | */ |
| 47 | protected TerminalSize $terminalSize; |
| 48 | |
| 49 | /** |
| 50 | * @var int The rendered cursor position |
| 51 | */ |
| 52 | protected int $renderX = 0; |
| 53 | |
| 54 | /** |
| 55 | * @var bool Should we stop the rendering loop? |
| 56 | */ |
| 57 | protected bool $shouldQuit = false; |
| 58 | |
| 59 | /** |
| 60 | * @var int The number of times to confirm you wish to quit |
| 61 | */ |
| 62 | protected int $quitTimes = KILO_QUIT_TIMES; |
| 63 | |
| 64 | /** |
| 65 | * Create the Editor instance with CLI arguments |
| 66 | * |
| 67 | * @param int $argc |
| 68 | * @param array $argv |
| 69 | * @return Editor |
| 70 | */ |
| 71 | public static function new(int $argc = 0, array $argv = []): Editor |
| 72 | { |
| 73 | if ($argc >= 2 && ! empty($argv[1])) |
| 74 | { |
| 75 | return new self($argv[1]); |
| 76 | } |
| 77 | |
| 78 | return new self(); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * The real constructor, ladies and gentlemen |
| 83 | * |
| 84 | * @param string|null $filename |
| 85 | */ |
| 86 | private function __construct(?string $filename = NULL) |
| 87 | { |
| 88 | $this->statusMessage = StatusMessage::from('HELP: Ctrl-S = save | Ctrl-Q = quit | Ctrl-F = find'); |
| 89 | $this->cursor = Point::new(); |
| 90 | $this->offset = Point::new(); |
| 91 | $this->terminalSize = Terminal::size(); |
| 92 | |
| 93 | if (is_string($filename)) |
| 94 | { |
| 95 | $maybeDocument = Document::new()->open($filename); |
| 96 | if ($maybeDocument === NULL) |
| 97 | { |
| 98 | $this->document = Document::new(); |
| 99 | $this->setStatusMessage("ERR: Could not open file: {}", $filename); |
| 100 | } |
| 101 | else |
| 102 | { |
| 103 | $this->document = $maybeDocument; |
| 104 | } |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | $this->document = Document::new(); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | public function __debugInfo(): array |
| 113 | { |
| 114 | return [ |
| 115 | 'cursor' => $this->cursor, |
| 116 | 'document' => $this->document, |
| 117 | 'offset' => $this->offset, |
| 118 | 'renderX' => $this->renderX, |
| 119 | 'terminalSize' => $this->terminalSize, |
| 120 | 'statusMessage' => $this->statusMessage, |
| 121 | ]; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Start the input loop |
| 126 | */ |
| 127 | public function run(): void |
| 128 | { |
| 129 | while ( ! $this->shouldQuit) |
| 130 | { |
| 131 | $this->refreshScreen(); |
| 132 | $this->processKeypress(); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Set a status message to be displayed, using printf formatting |
| 138 | * @param string $fmt |
| 139 | * @param mixed ...$args |
| 140 | */ |
| 141 | public function setStatusMessage(string $fmt, mixed ...$args): void |
| 142 | { |
| 143 | $text = func_num_args() > 1 |
| 144 | ? sprintf($fmt, ...$args) |
| 145 | : $fmt; |
| 146 | |
| 147 | $this->statusMessage = StatusMessage::from($text); |
| 148 | } |
| 149 | |
| 150 | // ------------------------------------------------------------------------ |
| 151 | // ! Row Operations |
| 152 | // ------------------------------------------------------------------------ |
| 153 | |
| 154 | /** |
| 155 | * Cursor X to Render X |
| 156 | * |
| 157 | * @param Row $row |
| 158 | * @param int $cx |
| 159 | * @return int |
| 160 | */ |
| 161 | protected function rowCxToRx(Row $row, int $cx): int |
| 162 | { |
| 163 | $rx = 0; |
| 164 | for ($i = 0; $i < $cx; $i++) |
| 165 | { |
| 166 | if ($row->chars[$i] === RawKeyCode::TAB) |
| 167 | { |
| 168 | $rx += (KILO_TAB_STOP - 1) - ($rx % KILO_TAB_STOP); |
| 169 | } |
| 170 | $rx++; |
| 171 | } |
| 172 | |
| 173 | return $rx; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Render X to Cursor X |
| 178 | * |
| 179 | * @param Row $row |
| 180 | * @param int $rx |
| 181 | * @return int |
| 182 | */ |
| 183 | protected function rowRxToCx(Row $row, int $rx): int |
| 184 | { |
| 185 | $cur_rx = 0; |
| 186 | for ($cx = 0; $cx < $row->size; $cx++) |
| 187 | { |
| 188 | if ($row->chars[$cx] === RawKeyCode::TAB) |
| 189 | { |
| 190 | $cur_rx += (KILO_TAB_STOP - 1) - ($cur_rx % KILO_TAB_STOP); |
| 191 | } |
| 192 | $cur_rx++; |
| 193 | |
| 194 | if ($cur_rx > $rx) |
| 195 | { |
| 196 | return $cx; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | return $cx; |
| 201 | } |
| 202 | |
| 203 | // ------------------------------------------------------------------------ |
| 204 | // ! File I/O |
| 205 | // ------------------------------------------------------------------------ |
| 206 | |
| 207 | protected function save(): void |
| 208 | { |
| 209 | if ($this->document->filename === '') |
| 210 | { |
| 211 | $newFilename = $this->prompt('Save as: %s'); |
| 212 | if ($newFilename === '') |
| 213 | { |
| 214 | $this->setStatusMessage('Save aborted'); |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | $this->document->filename = $newFilename; |
| 219 | } |
| 220 | |
| 221 | $res = $this->document->save(); |
| 222 | |
| 223 | if ($res !== FALSE) |
| 224 | { |
| 225 | $this->setStatusMessage('%d bytes written to disk', $res); |
| 226 | return; |
| 227 | } |
| 228 | |
| 229 | $this->setStatusMessage('Failed to save! I/O error: %s', error_get_last()['message'] ?? ''); |
| 230 | } |
| 231 | |
| 232 | // ------------------------------------------------------------------------ |
| 233 | // ! Find |
| 234 | // ------------------------------------------------------------------------ |
| 235 | |
| 236 | protected function findCallback(string $query, string $key): void |
| 237 | { |
| 238 | static $lastMatch = NO_MATCH; |
| 239 | static $direction = SearchDirection::FORWARD; |
| 240 | |
| 241 | static $savedHlLine = 0; |
| 242 | static $savedHl = []; |
| 243 | |
| 244 | if ( ! empty($savedHl)) |
| 245 | { |
| 246 | $row = $this->document->row($savedHlLine); |
| 247 | |
| 248 | if ($row->isValid()) |
| 249 | { |
| 250 | $row->hl = $savedHl; |
| 251 | } |
| 252 | |
| 253 | $savedHl = []; |
| 254 | } |
| 255 | |
| 256 | $direction = match ($key) { |
| 257 | KeyType::ARROW_UP, KeyType::ARROW_LEFT => SearchDirection::BACKWARD, |
| 258 | default => SearchDirection::FORWARD |
| 259 | }; |
| 260 | |
| 261 | $arrowKeys = [KeyType::ARROW_UP, KeyType::ARROW_DOWN, KeyType::ARROW_LEFT, KeyType::ARROW_RIGHT]; |
| 262 | |
| 263 | // Reset search state with non arrow-key input |
| 264 | if ( ! in_array($key, $arrowKeys, true)) |
| 265 | { |
| 266 | $lastMatch = NO_MATCH; |
| 267 | $direction = SearchDirection::FORWARD; |
| 268 | |
| 269 | if ($key === RawKeyCode::ENTER || $key === RawKeyCode::ESCAPE) |
| 270 | { |
| 271 | return; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | if ($lastMatch === NO_MATCH) |
| 276 | { |
| 277 | $direction = SearchDirection::FORWARD; |
| 278 | } |
| 279 | |
| 280 | $current = (int)$lastMatch; |
| 281 | |
| 282 | if (empty($query)) |
| 283 | { |
| 284 | return; |
| 285 | } |
| 286 | |
| 287 | for ($i = 0; $i < $this->document->numRows; $i++) |
| 288 | { |
| 289 | $current += $direction; |
| 290 | if ($current === -1) |
| 291 | { |
| 292 | $current = $this->document->numRows - 1; |
| 293 | } |
| 294 | else if ($current === $this->document->numRows) |
| 295 | { |
| 296 | $current = 0; |
| 297 | } |
| 298 | |
| 299 | $row = $this->document->row($current); |
| 300 | if ( ! $row->isValid()) |
| 301 | { |
| 302 | break; |
| 303 | } |
| 304 | |
| 305 | $match = strpos($row->render, $query); |
| 306 | if ($match !== FALSE) |
| 307 | { |
| 308 | $lastMatch = $current; |
| 309 | $this->cursor->y = (int)$current; |
| 310 | $this->cursor->x = $this->rowRxToCx($row, $match); |
| 311 | $this->offset->y = $this->document->numRows; |
| 312 | |
| 313 | $savedHlLine = $current; |
| 314 | $savedHl = $row->hl; |
| 315 | // Update the highlight array of the relevant row with the 'MATCH' type |
| 316 | array_replace_range($row->hl, $match, strlen($query), Highlight::MATCH); |
| 317 | |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | protected function find(): void |
| 324 | { |
| 325 | $savedCursor = Point::from($this->cursor); |
| 326 | $savedOffset = Point::from($this->offset); |
| 327 | |
| 328 | $query = $this->prompt('Search: %s (Use ESC/Arrows/Enter)', [$this, 'findCallback']); |
| 329 | |
| 330 | // If they pressed escape, the query will be empty, |
| 331 | // restore original cursor and scroll locations |
| 332 | if ($query === '') |
| 333 | { |
| 334 | $this->cursor = Point::from($savedCursor); |
| 335 | $this->offset = Point::from($savedOffset); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | // ------------------------------------------------------------------------ |
| 340 | // ! Output |
| 341 | // ------------------------------------------------------------------------ |
| 342 | |
| 343 | protected function scroll(): void |
| 344 | { |
| 345 | $this->renderX = 0; |
| 346 | if ($this->cursor->y < $this->document->numRows) |
| 347 | { |
| 348 | $row = $this->document->row($this->cursor->y); |
| 349 | |
| 350 | if ($row->isValid()) |
| 351 | { |
| 352 | $this->renderX = $this->rowCxToRx($row, $this->cursor->x); |
| 353 | } |
| 354 | |
| 355 | } |
| 356 | |
| 357 | // Vertical Scrolling |
| 358 | if ($this->cursor->y < $this->offset->y) |
| 359 | { |
| 360 | $this->offset->y = $this->cursor->y; |
| 361 | } |
| 362 | else if ($this->cursor->y >= ($this->offset->y + $this->terminalSize->rows)) |
| 363 | { |
| 364 | $this->offset->y = $this->cursor->y - $this->terminalSize->rows + 1; |
| 365 | } |
| 366 | |
| 367 | // Horizontal Scrolling |
| 368 | if ($this->renderX < $this->offset->x) |
| 369 | { |
| 370 | $this->offset->x = $this->renderX; |
| 371 | } |
| 372 | else if ($this->renderX >= ($this->offset->x + $this->terminalSize->cols)) |
| 373 | { |
| 374 | $this->offset->x = $this->renderX - $this->terminalSize->cols + 1; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | protected function drawRows(): void |
| 379 | { |
| 380 | for ($y = 0; $y < $this->terminalSize->rows; $y++) |
| 381 | { |
| 382 | $fileRow = $y + $this->offset->y; |
| 383 | |
| 384 | $this->outputBuffer .= ANSI::CLEAR_LINE; |
| 385 | |
| 386 | ($fileRow >= $this->document->numRows) |
| 387 | ? $this->drawPlaceholderRow($y) |
| 388 | : $this->drawRow($fileRow); |
| 389 | |
| 390 | $this->outputBuffer .= "\r\n"; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | protected function drawRow(int $rowIdx): void |
| 395 | { |
| 396 | $row = $this->document->row($rowIdx); |
| 397 | if ( ! $row->isValid()) |
| 398 | { |
| 399 | return; |
| 400 | } |
| 401 | |
| 402 | $len = $row->rsize - $this->offset->x; |
| 403 | if ($len < 0) |
| 404 | { |
| 405 | $len = 0; |
| 406 | } |
| 407 | if ($len > $this->terminalSize->cols) |
| 408 | { |
| 409 | $len = $this->terminalSize->cols; |
| 410 | } |
| 411 | |
| 412 | $chars = substr($row->render, $this->offset->x, (int)$len); |
| 413 | $hl = array_slice($row->hl, $this->offset->x, (int)$len); |
| 414 | |
| 415 | $currentColor = -1; |
| 416 | |
| 417 | for ($i = 0; $i < $len; $i++) |
| 418 | { |
| 419 | $ch = $chars[$i]; |
| 420 | |
| 421 | // Handle 'non-printable' characters |
| 422 | if (is_ctrl($ch)) |
| 423 | { |
| 424 | $sym = (ord($ch) <= 26) |
| 425 | ? chr(ord('@') + ord($ch)) |
| 426 | : '?'; |
| 427 | $this->outputBuffer .= ANSI::color(Color::INVERT); |
| 428 | $this->outputBuffer .= $sym; |
| 429 | $this->outputBuffer .= ANSI::RESET_TEXT; |
| 430 | if ($currentColor !== -1) |
| 431 | { |
| 432 | $this->outputBuffer .= ANSI::color($currentColor); |
| 433 | } |
| 434 | } |
| 435 | else if ($hl[$i] === Highlight::NORMAL) |
| 436 | { |
| 437 | if ($currentColor !== -1) |
| 438 | { |
| 439 | $this->outputBuffer .= ANSI::RESET_TEXT; |
| 440 | $this->outputBuffer .= ANSI::color(Color::FG_WHITE); |
| 441 | $currentColor = -1; |
| 442 | } |
| 443 | $this->outputBuffer .= $ch; |
| 444 | } |
| 445 | else |
| 446 | { |
| 447 | $color = syntax_to_color($hl[$i]); |
| 448 | if ($color !== $currentColor) |
| 449 | { |
| 450 | $currentColor = $color; |
| 451 | $this->outputBuffer .= ANSI::RESET_TEXT; |
| 452 | $this->outputBuffer .= ANSI::color($color); |
| 453 | } |
| 454 | $this->outputBuffer .= $ch; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | $this->outputBuffer .= ANSI::RESET_TEXT; |
| 459 | $this->outputBuffer .= ANSI::color(Color::FG_WHITE); |
| 460 | } |
| 461 | |
| 462 | protected function drawPlaceholderRow(int $y): void |
| 463 | { |
| 464 | if ($this->document->numRows === 0 && $y === (int)($this->terminalSize->rows / 2)) |
| 465 | { |
| 466 | $welcome = sprintf('PHP Kilo editor -- version %s', KILO_VERSION); |
| 467 | $welcomelen = strlen($welcome); |
| 468 | if ($welcomelen > $this->terminalSize->cols) |
| 469 | { |
| 470 | $welcomelen = $this->terminalSize->cols; |
| 471 | } |
| 472 | |
| 473 | $padding = ($this->terminalSize->cols - $welcomelen) / 2; |
| 474 | if ($padding > 0) |
| 475 | { |
| 476 | $this->outputBuffer .= '~'; |
| 477 | $padding--; |
| 478 | } |
| 479 | for ($i = 0; $i < $padding; $i++) |
| 480 | { |
| 481 | $this->outputBuffer .= ' '; |
| 482 | } |
| 483 | |
| 484 | $this->outputBuffer .= substr($welcome, 0, $welcomelen); |
| 485 | } |
| 486 | else |
| 487 | { |
| 488 | $this->outputBuffer .= '~'; |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | protected function drawStatusBar(): void |
| 493 | { |
| 494 | $this->outputBuffer .= ANSI::color(Color::INVERT); |
| 495 | |
| 496 | $statusFilename = $this->document->filename !== '' ? $this->document->filename : '[No Name]'; |
| 497 | $syntaxType = $this->document->fileType->name; |
| 498 | $isDirty = $this->document->isDirty() ? '(modified)' : ''; |
| 499 | $status = sprintf('%.20s - %d lines %s', $statusFilename, $this->document->numRows, $isDirty); |
| 500 | $rstatus = sprintf('%s | %d/%d', $syntaxType, $this->cursor->y + 1, $this->document->numRows); |
| 501 | $len = strlen($status); |
| 502 | $rlen = strlen($rstatus); |
| 503 | if ($len > $this->terminalSize->cols) |
| 504 | { |
| 505 | $len = $this->terminalSize->cols; |
| 506 | } |
| 507 | $this->outputBuffer .= substr($status, 0, $len); |
| 508 | while ($len < $this->terminalSize->cols) |
| 509 | { |
| 510 | if ($this->terminalSize->cols - $len === $rlen) |
| 511 | { |
| 512 | $this->outputBuffer .= substr($rstatus, 0, $rlen); |
| 513 | break; |
| 514 | } |
| 515 | |
| 516 | $this->outputBuffer .= ' '; |
| 517 | $len++; |
| 518 | } |
| 519 | $this->outputBuffer .= ANSI::RESET_TEXT; |
| 520 | $this->outputBuffer .= "\r\n"; |
| 521 | } |
| 522 | |
| 523 | protected function drawMessageBar(): void |
| 524 | { |
| 525 | $this->outputBuffer .= ANSI::CLEAR_LINE; |
| 526 | $len = $this->statusMessage->len; |
| 527 | if ($len > $this->terminalSize->cols) |
| 528 | { |
| 529 | $len = $this->terminalSize->cols; |
| 530 | } |
| 531 | |
| 532 | // If there is a message, and it's been less than 5 seconds since |
| 533 | // last screen update, show the message |
| 534 | if ($len > 0 && (time() - $this->statusMessage->time) < 5) |
| 535 | { |
| 536 | $this->outputBuffer .= substr($this->statusMessage->text, 0, $len); |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | protected function refreshScreen(): void |
| 541 | { |
| 542 | $this->scroll(); |
| 543 | |
| 544 | $this->outputBuffer = ANSI::HIDE_CURSOR . ANSI::RESET_CURSOR; |
| 545 | |
| 546 | $this->drawRows(); |
| 547 | $this->drawStatusBar(); |
| 548 | $this->drawMessageBar(); |
| 549 | |
| 550 | // Specify the current cursor position |
| 551 | $this->outputBuffer .= ANSI::moveCursor( |
| 552 | $this->cursor->y - $this->offset->y, |
| 553 | $this->renderX - $this->offset->x |
| 554 | ); |
| 555 | |
| 556 | $this->outputBuffer .= ANSI::SHOW_CURSOR; |
| 557 | |
| 558 | Terminal::write($this->outputBuffer, strlen($this->outputBuffer)); |
| 559 | } |
| 560 | |
| 561 | // ------------------------------------------------------------------------ |
| 562 | // ! Input |
| 563 | // ------------------------------------------------------------------------ |
| 564 | |
| 565 | protected function prompt(string $prompt, ?callable $callback = NULL): string |
| 566 | { |
| 567 | $buffer = ''; |
| 568 | $modifiers = KeyType::getConstList(); |
| 569 | while (TRUE) |
| 570 | { |
| 571 | $this->setStatusMessage($prompt, $buffer); |
| 572 | $this->refreshScreen(); |
| 573 | |
| 574 | $c = Terminal::readKey(); |
| 575 | $isModifier = in_array($c, $modifiers, TRUE); |
| 576 | |
| 577 | if ($c === KeyType::ESCAPE || ($c === RawKeyCode::ENTER && $buffer !== '')) |
| 578 | { |
| 579 | $this->setStatusMessage(''); |
| 580 | if ($callback !== NULL) |
| 581 | { |
| 582 | $callback($buffer, $c); |
| 583 | } |
| 584 | return ($c === RawKeyCode::ENTER) ? $buffer : ''; |
| 585 | } |
| 586 | |
| 587 | if ($c === KeyType::DELETE || $c === KeyType::BACKSPACE) |
| 588 | { |
| 589 | $buffer = substr($buffer, 0, -1); |
| 590 | } |
| 591 | else if (is_ascii($c) && ( ! (is_ctrl($c) || $isModifier))) |
| 592 | { |
| 593 | $buffer .= $c; |
| 594 | } |
| 595 | |
| 596 | if ($callback !== NULL) |
| 597 | { |
| 598 | $callback($buffer, $c); |
| 599 | } |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | /** |
| 604 | * Input processing |
| 605 | */ |
| 606 | protected function processKeypress(): void |
| 607 | { |
| 608 | $c = Terminal::readKey(); |
| 609 | |
| 610 | if ($c === RawKeyCode::NULL || $c === RawKeyCode::EMPTY) |
| 611 | { |
| 612 | return; |
| 613 | } |
| 614 | |
| 615 | switch ($c) |
| 616 | { |
| 617 | case RawKeyCode::CTRL('q'): |
| 618 | $this->quitAttempt(); |
| 619 | return; |
| 620 | |
| 621 | case RawKeyCode::CTRL('s'): |
| 622 | $this->save(); |
| 623 | break; |
| 624 | |
| 625 | case RawKeyCode::CTRL('f'): |
| 626 | $this->find(); |
| 627 | break; |
| 628 | |
| 629 | case KeyType::DELETE: |
| 630 | case KeyType::BACKSPACE: |
| 631 | $this->removeChar($c); |
| 632 | break; |
| 633 | |
| 634 | case KeyType::ARROW_UP: |
| 635 | case KeyType::ARROW_DOWN: |
| 636 | case KeyType::ARROW_LEFT: |
| 637 | case KeyType::ARROW_RIGHT: |
| 638 | case KeyType::PAGE_UP: |
| 639 | case KeyType::PAGE_DOWN: |
| 640 | case KeyType::HOME: |
| 641 | case KeyType::END: |
| 642 | $this->moveCursor($c); |
| 643 | break; |
| 644 | |
| 645 | case RawKeyCode::CTRL('l'): |
| 646 | case KeyType::ESCAPE: |
| 647 | // Do nothing |
| 648 | break; |
| 649 | |
| 650 | default: |
| 651 | $this->insertChar($c); |
| 652 | break; |
| 653 | } |
| 654 | |
| 655 | // Reset quit confirmation timer on different keypress |
| 656 | if ($this->quitTimes < KILO_QUIT_TIMES) |
| 657 | { |
| 658 | $this->quitTimes = KILO_QUIT_TIMES; |
| 659 | $this->setStatusMessage(''); |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | // ------------------------------------------------------------------------ |
| 664 | // ! Editor operation helpers |
| 665 | // ------------------------------------------------------------------------ |
| 666 | |
| 667 | protected function moveCursor(string $key): void |
| 668 | { |
| 669 | $x = $this->cursor->x; |
| 670 | $y = $this->cursor->y; |
| 671 | $row = $this->document->row($y); |
| 672 | if ( ! $row->isValid()) |
| 673 | { |
| 674 | return; |
| 675 | } |
| 676 | |
| 677 | switch ($key) |
| 678 | { |
| 679 | case KeyType::ARROW_LEFT: |
| 680 | if ($x !== 0) |
| 681 | { |
| 682 | $x--; |
| 683 | } |
| 684 | else if ($y > 0) |
| 685 | { |
| 686 | // Beginning of a line, go to end of previous line |
| 687 | $y--; |
| 688 | $x = $row->size - 1; |
| 689 | } |
| 690 | break; |
| 691 | |
| 692 | case KeyType::ARROW_RIGHT: |
| 693 | if ($x < $row->size) |
| 694 | { |
| 695 | $x++; |
| 696 | } |
| 697 | else if ($x === $row->size) |
| 698 | { |
| 699 | $y++; |
| 700 | $x = 0; |
| 701 | } |
| 702 | break; |
| 703 | |
| 704 | case KeyType::ARROW_UP: |
| 705 | if ($y !== 0) |
| 706 | { |
| 707 | $y--; |
| 708 | } |
| 709 | break; |
| 710 | |
| 711 | case KeyType::ARROW_DOWN: |
| 712 | if ($y < $this->document->numRows) |
| 713 | { |
| 714 | $y++; |
| 715 | } |
| 716 | break; |
| 717 | |
| 718 | case KeyType::PAGE_UP: |
| 719 | $y = saturating_sub($y, $this->terminalSize->rows); |
| 720 | // $y = ($y > $this->terminalSize->rows) |
| 721 | // ? $y - $this->terminalSize->rows |
| 722 | // : 0; |
| 723 | break; |
| 724 | |
| 725 | case KeyType::PAGE_DOWN: |
| 726 | $y = saturating_add($y, $this->terminalSize->rows, $this->document->numRows); |
| 727 | // $y = ($y + $this->terminalSize->rows < $this->document->numRows) |
| 728 | // ? $y + $this->terminalSize->rows |
| 729 | // : $this->document->numRows; |
| 730 | break; |
| 731 | |
| 732 | case KeyType::HOME: |
| 733 | $x = 0; |
| 734 | break; |
| 735 | |
| 736 | case KeyType::END: |
| 737 | if ($y < $this->document->numRows) |
| 738 | { |
| 739 | $x = $row->size; |
| 740 | } |
| 741 | break; |
| 742 | |
| 743 | default: |
| 744 | // Do nothing |
| 745 | } |
| 746 | |
| 747 | // Snap cursor to the end of a row when moving |
| 748 | // from a longer row to a shorter one |
| 749 | $row = $this->document->row($y); |
| 750 | if ($row->isValid()) |
| 751 | { |
| 752 | if ($x > $row->size) |
| 753 | { |
| 754 | $x = $row->size; |
| 755 | } |
| 756 | |
| 757 | $this->cursor->x = $x; |
| 758 | $this->cursor->y = $y; |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | protected function insertChar(string $c): void |
| 763 | { |
| 764 | $this->document->insert($this->cursor, $c); |
| 765 | $this->moveCursor(KeyType::ARROW_RIGHT); |
| 766 | } |
| 767 | |
| 768 | protected function removeChar(string $ch): void |
| 769 | { |
| 770 | if ($ch === KeyType::DELETE) |
| 771 | { |
| 772 | $this->document->delete($this->cursor); |
| 773 | } |
| 774 | |
| 775 | if ($ch === KeyType::BACKSPACE && ($this->cursor->x > 0 || $this->cursor->y > 0)) |
| 776 | { |
| 777 | $this->moveCursor(KeyType::ARROW_LEFT); |
| 778 | $this->document->delete($this->cursor); |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | protected function quitAttempt(): void |
| 783 | { |
| 784 | if ($this->document->isDirty() && $this->quitTimes > 0) |
| 785 | { |
| 786 | if ($this->quitTimes === KILO_QUIT_TIMES) |
| 787 | { |
| 788 | Terminal::ding(); |
| 789 | } |
| 790 | |
| 791 | $this->setStatusMessage( |
| 792 | 'WARNING!!! File has unsaved changes. Press Ctrl-Q %d more times to quit.', |
| 793 | $this->quitTimes |
| 794 | ); |
| 795 | |
| 796 | $this->quitTimes--; |
| 797 | return; |
| 798 | } |
| 799 | |
| 800 | Terminal::clear(); |
| 801 | |
| 802 | $this->shouldQuit = true; |
| 803 | } |
| 804 | } |