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| 1 | <?php declare(strict_types=1); |
| 2 | |
| 3 | namespace Aviat\Kilo; |
| 4 | |
| 5 | use Aviat\Kilo\Enum\{Color, KeyCode, KeyType, Highlight}; |
| 6 | use Aviat\Kilo\Tokens\PHP8; |
| 7 | |
| 8 | /** |
| 9 | * // Don't highlight this! |
| 10 | * @property-read int numRows |
| 11 | */ |
| 12 | class Editor { |
| 13 | use Traits\MagicProperties; |
| 14 | |
| 15 | private string $ab = ''; |
| 16 | |
| 17 | protected int $cursorX = 0; |
| 18 | protected int $cursorY = 0; |
| 19 | protected int $renderX = 0; |
| 20 | protected int $rowOffset = 0; |
| 21 | protected int $colOffset = 0; |
| 22 | protected int $screenRows = 0; |
| 23 | protected int $screenCols = 0; |
| 24 | |
| 25 | /** |
| 26 | * Array of Row objects |
| 27 | */ |
| 28 | public array $rows = []; |
| 29 | |
| 30 | public int $dirty = 0; |
| 31 | public string $filename = ''; |
| 32 | protected string $statusMsg = ''; |
| 33 | protected int $statusMsgTime; |
| 34 | |
| 35 | public ?Syntax $syntax = NULL; |
| 36 | |
| 37 | // Tokens for highlighting PHP |
| 38 | public array $tokens = []; |
| 39 | |
| 40 | public static function new(): Editor |
| 41 | { |
| 42 | return new self(); |
| 43 | } |
| 44 | |
| 45 | private function __construct() |
| 46 | { |
| 47 | $this->statusMsgTime = time(); |
| 48 | |
| 49 | [$this->screenRows, $this->screenCols] = get_window_size(); |
| 50 | |
| 51 | // Remove a row for the status bar, and one for the message bar |
| 52 | $this->screenRows -= 2; |
| 53 | } |
| 54 | |
| 55 | public function __get(string $name): ?int |
| 56 | { |
| 57 | if ($name === 'numRows') |
| 58 | { |
| 59 | return count($this->rows); |
| 60 | } |
| 61 | |
| 62 | return NULL; |
| 63 | } |
| 64 | |
| 65 | public function __debugInfo(): array |
| 66 | { |
| 67 | return [ |
| 68 | 'colOffset' => $this->colOffset, |
| 69 | 'cursorX' => $this->cursorX, |
| 70 | 'cursorY' => $this->cursorY, |
| 71 | 'dirty' => $this->dirty, |
| 72 | 'filename' => $this->filename, |
| 73 | 'renderX' => $this->renderX, |
| 74 | 'rowOffset' => $this->rowOffset, |
| 75 | 'rows' => $this->rows, |
| 76 | 'screenCols' => $this->screenCols, |
| 77 | 'screenRows' => $this->screenRows, |
| 78 | 'statusMsg' => $this->statusMsg, |
| 79 | 'syntax' => $this->syntax, |
| 80 | 'tokens' => $this->tokens, |
| 81 | ]; |
| 82 | } |
| 83 | |
| 84 | // ------------------------------------------------------------------------ |
| 85 | // ! Terminal |
| 86 | // ------------------------------------------------------------------------ |
| 87 | protected function readKey(): string |
| 88 | { |
| 89 | $c = read_stdin(); |
| 90 | |
| 91 | return match($c) |
| 92 | { |
| 93 | // Unambiguous mappings |
| 94 | KeyCode::ARROW_DOWN => KeyType::ARROW_DOWN, |
| 95 | KeyCode::ARROW_LEFT => KeyType::ARROW_LEFT, |
| 96 | KeyCode::ARROW_RIGHT => KeyType::ARROW_RIGHT, |
| 97 | KeyCode::ARROW_UP => KeyType::ARROW_UP, |
| 98 | KeyCode::DEL_KEY => KeyType::DEL_KEY, |
| 99 | KeyCode::ENTER => KeyType::ENTER, |
| 100 | KeyCode::PAGE_DOWN => KeyType::PAGE_DOWN, |
| 101 | KeyCode::PAGE_UP => KeyType::PAGE_UP, |
| 102 | |
| 103 | // Backspace |
| 104 | KeyCode::CTRL('h'), KeyCode::BACKSPACE => KeyType::BACKSPACE, |
| 105 | |
| 106 | // Escape |
| 107 | KeyCode::CTRL('l'), KeyCode::ESCAPE => KeyType::ESCAPE, |
| 108 | |
| 109 | // Home Key |
| 110 | "\eOH", "\e[7~", "\e[1~", ANSI::RESET_CURSOR => KeyType::HOME_KEY, |
| 111 | |
| 112 | // End Key |
| 113 | "\eOF", "\e[4~", "\e[8~", "\e[F" => KeyType::END_KEY, |
| 114 | |
| 115 | default => $c, |
| 116 | }; |
| 117 | } |
| 118 | |
| 119 | protected function selectSyntaxHighlight(): void |
| 120 | { |
| 121 | $this->syntax = NULL; |
| 122 | if (empty($this->filename)) |
| 123 | { |
| 124 | return; |
| 125 | } |
| 126 | |
| 127 | // In PHP, `strchr` and `strstr` are the same function |
| 128 | $ext = (string)strstr(basename($this->filename), '.'); |
| 129 | |
| 130 | foreach (get_file_syntax_map() as $syntax) |
| 131 | { |
| 132 | if ( |
| 133 | in_array($ext, $syntax->filematch, TRUE) || |
| 134 | in_array(basename($this->filename), $syntax->filematch, TRUE) |
| 135 | ) { |
| 136 | $this->syntax = $syntax; |
| 137 | |
| 138 | // Pre-tokenize the file |
| 139 | if ($this->syntax->filetype === 'PHP') |
| 140 | { |
| 141 | $this->tokens = PHP8::getFileTokens($this->filename); |
| 142 | } |
| 143 | |
| 144 | $this->refreshSyntax(); |
| 145 | |
| 146 | return; |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | // ------------------------------------------------------------------------ |
| 152 | // ! Row Operations |
| 153 | // ------------------------------------------------------------------------ |
| 154 | |
| 155 | protected function rowCxToRx(Row $row, int $cx): int |
| 156 | { |
| 157 | $rx = 0; |
| 158 | for ($i = 0; $i < $cx; $i++) |
| 159 | { |
| 160 | if ($row->chars[$i] === KeyCode::TAB) |
| 161 | { |
| 162 | $rx += (KILO_TAB_STOP - 1) - ($rx % KILO_TAB_STOP); |
| 163 | } |
| 164 | $rx++; |
| 165 | } |
| 166 | |
| 167 | return $rx; |
| 168 | } |
| 169 | |
| 170 | protected function rowRxToCx(Row $row, int $rx): int |
| 171 | { |
| 172 | $cur_rx = 0; |
| 173 | for ($cx = 0; $cx < $row->size; $cx++) |
| 174 | { |
| 175 | if ($row->chars[$cx] === KeyCode::TAB) |
| 176 | { |
| 177 | $cur_rx += (KILO_TAB_STOP - 1) - ($cur_rx % KILO_TAB_STOP); |
| 178 | } |
| 179 | $cur_rx++; |
| 180 | |
| 181 | if ($cur_rx > $rx) |
| 182 | { |
| 183 | return $cx; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | return $cx; |
| 188 | } |
| 189 | |
| 190 | protected function insertRow(int $at, string $s, bool $updateSyntax = TRUE): void |
| 191 | { |
| 192 | if ($at < 0 || $at > $this->numRows) |
| 193 | { |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | $row = Row::new($this, $s, $at); |
| 198 | |
| 199 | if ($at === $this->numRows) |
| 200 | { |
| 201 | $this->rows[] = $row; |
| 202 | } |
| 203 | else |
| 204 | { |
| 205 | $this->rows = [ |
| 206 | ...array_slice($this->rows, 0, $at), |
| 207 | $row, |
| 208 | ...array_slice($this->rows, $at), |
| 209 | ]; |
| 210 | } |
| 211 | |
| 212 | ksort($this->rows); |
| 213 | |
| 214 | $this->rows[$at]->update(); |
| 215 | |
| 216 | $this->dirty++; |
| 217 | |
| 218 | // Re-tokenize the file |
| 219 | if ($updateSyntax) |
| 220 | { |
| 221 | $this->refreshPHPSyntax(); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | protected function deleteRow(int $at): void |
| 226 | { |
| 227 | if ($at < 0 || $at >= $this->numRows) |
| 228 | { |
| 229 | return; |
| 230 | } |
| 231 | |
| 232 | // Remove the row |
| 233 | unset($this->rows[$at]); |
| 234 | |
| 235 | // Re-index the array of rows |
| 236 | $this->rows = array_values($this->rows); |
| 237 | for ($i = $at; $i < $this->numRows; $i++) |
| 238 | { |
| 239 | $this->rows[$i]->idx--; |
| 240 | } |
| 241 | |
| 242 | // Re-tokenize the file |
| 243 | $this->refreshPHPSyntax(); |
| 244 | |
| 245 | $this->dirty++; |
| 246 | } |
| 247 | |
| 248 | // ------------------------------------------------------------------------ |
| 249 | // ! Editor Operations |
| 250 | // ------------------------------------------------------------------------ |
| 251 | |
| 252 | protected function insertChar(string $c): void |
| 253 | { |
| 254 | if ($this->cursorY === $this->numRows) |
| 255 | { |
| 256 | $this->insertRow($this->numRows, ''); |
| 257 | } |
| 258 | $this->rows[$this->cursorY]->insertChar($this->cursorX, $c); |
| 259 | |
| 260 | // Re-tokenize the file |
| 261 | $this->refreshPHPSyntax(); |
| 262 | |
| 263 | $this->cursorX++; |
| 264 | } |
| 265 | |
| 266 | protected function insertNewline(): void |
| 267 | { |
| 268 | // @TODO attempt smart indentation on newline? |
| 269 | |
| 270 | if ($this->cursorX === 0) |
| 271 | { |
| 272 | $this->insertRow($this->cursorY, ''); |
| 273 | } |
| 274 | else |
| 275 | { |
| 276 | $row = $this->rows[$this->cursorY]; |
| 277 | $chars = $row->chars; |
| 278 | $newChars = substr($chars, 0, $this->cursorX); |
| 279 | |
| 280 | // Truncate the previous row |
| 281 | $row->chars = $newChars; |
| 282 | |
| 283 | // Add a new row, with the contents from the cursor to the end of the line |
| 284 | $this->insertRow($this->cursorY + 1, substr($chars, $this->cursorX)); |
| 285 | } |
| 286 | |
| 287 | $this->cursorY++; |
| 288 | $this->cursorX = 0; |
| 289 | |
| 290 | // Re-tokenize the file |
| 291 | $this->refreshPHPSyntax(); |
| 292 | } |
| 293 | |
| 294 | protected function deleteChar(): void |
| 295 | { |
| 296 | if ($this->cursorY === $this->numRows || ($this->cursorX === 0 && $this->cursorY === 0)) |
| 297 | { |
| 298 | return; |
| 299 | } |
| 300 | |
| 301 | $row = $this->rows[$this->cursorY]; |
| 302 | if ($this->cursorX > 0) |
| 303 | { |
| 304 | $row->deleteChar($this->cursorX - 1); |
| 305 | $this->cursorX--; |
| 306 | } |
| 307 | else |
| 308 | { |
| 309 | $this->cursorX = $this->rows[$this->cursorY - 1]->size; |
| 310 | $this->rows[$this->cursorY -1]->appendString($row->chars); |
| 311 | $this->deleteRow($this->cursorY); |
| 312 | $this->cursorY--; |
| 313 | } |
| 314 | |
| 315 | // Re-tokenize the file |
| 316 | $this->refreshPHPSyntax(); |
| 317 | } |
| 318 | |
| 319 | // ------------------------------------------------------------------------ |
| 320 | // ! File I/O |
| 321 | // ------------------------------------------------------------------------ |
| 322 | |
| 323 | protected function rowsToString(): string |
| 324 | { |
| 325 | $lines = array_map(fn (Row $row) => (string)$row, $this->rows); |
| 326 | |
| 327 | return implode('', $lines); |
| 328 | } |
| 329 | |
| 330 | public function open(string $filename): void |
| 331 | { |
| 332 | // Copy filename for display |
| 333 | $this->filename = $filename; |
| 334 | |
| 335 | $this->selectSyntaxHighlight(); |
| 336 | |
| 337 | $handle = fopen($filename, 'rb'); |
| 338 | if ($handle === FALSE) |
| 339 | { |
| 340 | $this->setStatusMessage('Failed to open file: %s', $filename); |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | while (($line = fgets($handle)) !== FALSE) |
| 345 | { |
| 346 | // Remove line endings when reading the file |
| 347 | $this->insertRow($this->numRows, rtrim($line), FALSE); |
| 348 | } |
| 349 | |
| 350 | fclose($handle); |
| 351 | |
| 352 | $this->dirty = 0; |
| 353 | } |
| 354 | |
| 355 | protected function save(): void |
| 356 | { |
| 357 | if ($this->filename === '') |
| 358 | { |
| 359 | $newFilename = $this->prompt('Save as: %s'); |
| 360 | if ($newFilename === '') |
| 361 | { |
| 362 | $this->setStatusMessage('Save aborted'); |
| 363 | return; |
| 364 | } |
| 365 | |
| 366 | $this->filename = $newFilename; |
| 367 | $this->selectSyntaxHighlight(); |
| 368 | } |
| 369 | |
| 370 | $contents = $this->rowsToString(); |
| 371 | |
| 372 | $res = file_put_contents($this->filename, $contents); |
| 373 | if ($res === strlen($contents)) |
| 374 | { |
| 375 | $this->setStatusMessage('%d bytes written to disk', strlen($contents)); |
| 376 | $this->dirty = 0; |
| 377 | return; |
| 378 | } |
| 379 | |
| 380 | $this->setStatusMessage('Failed to save! I/O error: %s', error_get_last()['message']); |
| 381 | } |
| 382 | |
| 383 | // ------------------------------------------------------------------------ |
| 384 | // ! Find |
| 385 | // ------------------------------------------------------------------------ |
| 386 | |
| 387 | protected function findCallback(string $query, string $key): void |
| 388 | { |
| 389 | static $lastMatch = -1; |
| 390 | static $direction = 1; |
| 391 | |
| 392 | static $savedHlLine = 0; |
| 393 | static $savedHl = []; |
| 394 | |
| 395 | if ( ! empty($savedHl)) |
| 396 | { |
| 397 | $this->rows[$savedHlLine]->hl = $savedHl; |
| 398 | $savedHl = []; |
| 399 | } |
| 400 | |
| 401 | switch ($key) |
| 402 | { |
| 403 | case KeyCode::ENTER: |
| 404 | case KeyCode::ESCAPE: |
| 405 | $lastMatch = -1; |
| 406 | $direction = 1; |
| 407 | return; |
| 408 | |
| 409 | case KeyType::ARROW_DOWN: |
| 410 | case KeyType::ARROW_RIGHT: |
| 411 | $direction = 1; |
| 412 | break; |
| 413 | |
| 414 | case KeyType::ARROW_UP: |
| 415 | case KeyType::ARROW_LEFT: |
| 416 | $direction = -1; |
| 417 | break; |
| 418 | |
| 419 | default: |
| 420 | $lastMatch = -1; |
| 421 | $direction = 1; |
| 422 | } |
| 423 | |
| 424 | if ($lastMatch === -1) |
| 425 | { |
| 426 | $direction = 1; |
| 427 | } |
| 428 | |
| 429 | $current = $lastMatch; |
| 430 | |
| 431 | if (empty($query)) |
| 432 | { |
| 433 | return; |
| 434 | } |
| 435 | |
| 436 | for ($i = 0; $i < $this->numRows; $i++) |
| 437 | { |
| 438 | $current += $direction; |
| 439 | if ($current === -1) |
| 440 | { |
| 441 | $current = $this->numRows - 1; |
| 442 | } |
| 443 | else if ($current === $this->numRows) |
| 444 | { |
| 445 | $current = 0; |
| 446 | } |
| 447 | |
| 448 | $row =& $this->rows[$current]; |
| 449 | |
| 450 | $match = strpos($row->render, $query); |
| 451 | if ($match !== FALSE) |
| 452 | { |
| 453 | $lastMatch = $current; |
| 454 | $this->cursorY = $current; |
| 455 | $this->cursorX = $this->rowRxToCx($row, $match); |
| 456 | $this->rowOffset = $this->numRows; |
| 457 | |
| 458 | $savedHlLine = $current; |
| 459 | $savedHl = $row->hl; |
| 460 | // Update the highlight array of the relevant row with the 'MATCH' type |
| 461 | array_replace_range($row->hl, $match, strlen($query), Highlight::MATCH); |
| 462 | |
| 463 | break; |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | protected function find(): void |
| 469 | { |
| 470 | $savedCx = $this->cursorX; |
| 471 | $savedCy = $this->cursorY; |
| 472 | $savedColOff = $this->colOffset; |
| 473 | $savedRowOff = $this->rowOffset; |
| 474 | |
| 475 | $query = $this->prompt('Search: %s (Use ESC/Arrows/Enter)', [$this, 'findCallback']); |
| 476 | |
| 477 | // If they pressed escape, the query will be empty, |
| 478 | // restore original cursor and scroll locations |
| 479 | if ($query === '') |
| 480 | { |
| 481 | $this->cursorX = $savedCx; |
| 482 | $this->cursorY = $savedCy; |
| 483 | $this->colOffset = $savedColOff; |
| 484 | $this->rowOffset = $savedRowOff; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | // ------------------------------------------------------------------------ |
| 489 | // ! Output |
| 490 | // ------------------------------------------------------------------------ |
| 491 | |
| 492 | protected function scroll(): void |
| 493 | { |
| 494 | $this->renderX = 0; |
| 495 | if ($this->cursorY < $this->numRows) |
| 496 | { |
| 497 | $this->renderX = $this->rowCxToRx($this->rows[$this->cursorY], $this->cursorX); |
| 498 | } |
| 499 | |
| 500 | // Vertical Scrolling |
| 501 | if ($this->cursorY < $this->rowOffset) |
| 502 | { |
| 503 | $this->rowOffset = $this->cursorY; |
| 504 | } |
| 505 | if ($this->cursorY >= ($this->rowOffset + $this->screenRows)) |
| 506 | { |
| 507 | $this->rowOffset = $this->cursorY - $this->screenRows + 1; |
| 508 | } |
| 509 | |
| 510 | // Horizontal Scrolling |
| 511 | if ($this->renderX < $this->colOffset) |
| 512 | { |
| 513 | $this->colOffset = $this->renderX; |
| 514 | } |
| 515 | if ($this->renderX >= ($this->colOffset + $this->screenCols)) |
| 516 | { |
| 517 | $this->colOffset = $this->renderX - $this->screenCols + 1; |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | protected function drawRows(): void |
| 522 | { |
| 523 | for ($y = 0; $y < $this->screenRows; $y++) |
| 524 | { |
| 525 | $filerow = $y + $this->rowOffset; |
| 526 | if ($filerow >= $this->numRows) |
| 527 | { |
| 528 | if ($this->numRows === 0 && $y === (int)($this->screenRows / 2)) |
| 529 | { |
| 530 | $welcome = sprintf('PHP Kilo editor -- version %s', KILO_VERSION); |
| 531 | $welcomelen = strlen($welcome); |
| 532 | if ($welcomelen > $this->screenCols) |
| 533 | { |
| 534 | $welcomelen = $this->screenCols; |
| 535 | } |
| 536 | |
| 537 | $padding = ($this->screenCols - $welcomelen) / 2; |
| 538 | if ($padding > 0) |
| 539 | { |
| 540 | $this->ab .= '~'; |
| 541 | $padding--; |
| 542 | } |
| 543 | for ($i = 0; $i < $padding; $i++) |
| 544 | { |
| 545 | $this->ab .= ' '; |
| 546 | } |
| 547 | |
| 548 | $this->ab .= substr($welcome, 0, $welcomelen); |
| 549 | } |
| 550 | else |
| 551 | { |
| 552 | $this->ab .= '~'; |
| 553 | } |
| 554 | } |
| 555 | else |
| 556 | { |
| 557 | $len = $this->rows[$filerow]->rsize - $this->colOffset; |
| 558 | if ($len < 0) |
| 559 | { |
| 560 | $len = 0; |
| 561 | } |
| 562 | if ($len > $this->screenCols) |
| 563 | { |
| 564 | $len = $this->screenCols; |
| 565 | } |
| 566 | |
| 567 | $c = substr($this->rows[$filerow]->render, $this->colOffset, $len); |
| 568 | $hl = array_slice($this->rows[$filerow]->hl, $this->colOffset, $len); |
| 569 | |
| 570 | $currentColor = -1; |
| 571 | |
| 572 | for ($i = 0; $i < $len; $i++) |
| 573 | { |
| 574 | // Handle 'non-printable' characters |
| 575 | if (is_ctrl($c[$i])) |
| 576 | { |
| 577 | $sym = (ord($c[$i]) <= 26) |
| 578 | ? chr(ord('@') + ord($c[$i])) |
| 579 | : '?'; |
| 580 | $this->ab .= ANSI::color(Color::INVERT); |
| 581 | $this->ab .= $sym; |
| 582 | $this->ab .= ANSI::RESET_TEXT; |
| 583 | if ($currentColor !== -1) |
| 584 | { |
| 585 | $this->ab .= ANSI::color($currentColor); |
| 586 | } |
| 587 | } |
| 588 | else if ($hl[$i] === Highlight::NORMAL) |
| 589 | { |
| 590 | if ($currentColor !== -1) |
| 591 | { |
| 592 | $this->ab .= ANSI::RESET_TEXT; |
| 593 | $this->ab .= ANSI::color(Color::FG_WHITE); |
| 594 | $currentColor = -1; |
| 595 | } |
| 596 | $this->ab .= $c[$i]; |
| 597 | } |
| 598 | else |
| 599 | { |
| 600 | $color = syntax_to_color($hl[$i]); |
| 601 | if ($color !== $currentColor) |
| 602 | { |
| 603 | $currentColor = $color; |
| 604 | $this->ab .= ANSI::RESET_TEXT; |
| 605 | $this->ab .= ANSI::color($color); |
| 606 | } |
| 607 | $this->ab .= $c[$i]; |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | $this->ab .= ANSI::RESET_TEXT; |
| 612 | $this->ab .= ANSI::color(Color::FG_WHITE); |
| 613 | } |
| 614 | |
| 615 | $this->ab .= ANSI::CLEAR_LINE; |
| 616 | $this->ab .= "\r\n"; |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | protected function drawStatusBar(): void |
| 621 | { |
| 622 | $this->ab .= ANSI::color(Color::INVERT); |
| 623 | |
| 624 | $statusFilename = $this->filename !== '' ? $this->filename : '[No Name]'; |
| 625 | $syntaxType = ($this->syntax !== NULL) ? $this->syntax->filetype : 'no ft'; |
| 626 | $isDirty = ($this->dirty > 0) ? '(modified)' : ''; |
| 627 | $status = sprintf('%.20s - %d lines %s', $statusFilename, $this->numRows, $isDirty); |
| 628 | $rstatus = sprintf('%s | %d/%d', $syntaxType, $this->cursorY + 1, $this->numRows); |
| 629 | $len = strlen($status); |
| 630 | $rlen = strlen($rstatus); |
| 631 | if ($len > $this->screenCols) |
| 632 | { |
| 633 | $len = $this->screenCols; |
| 634 | } |
| 635 | $this->ab .= substr($status, 0, $len); |
| 636 | while ($len < $this->screenCols) |
| 637 | { |
| 638 | if ($this->screenCols - $len === $rlen) |
| 639 | { |
| 640 | $this->ab .= substr($rstatus, 0, $rlen); |
| 641 | break; |
| 642 | } |
| 643 | |
| 644 | $this->ab .= ' '; |
| 645 | $len++; |
| 646 | } |
| 647 | $this->ab .= ANSI::RESET_TEXT; |
| 648 | $this->ab .= "\r\n"; |
| 649 | } |
| 650 | |
| 651 | protected function drawMessageBar(): void |
| 652 | { |
| 653 | $this->ab .= ANSI::CLEAR_LINE; |
| 654 | $len = strlen($this->statusMsg); |
| 655 | if ($len > $this->screenCols) |
| 656 | { |
| 657 | $len = $this->screenCols; |
| 658 | } |
| 659 | |
| 660 | if ($len > 0 && (time() - $this->statusMsgTime) < 5) |
| 661 | { |
| 662 | $this->ab .= substr($this->statusMsg, 0, $len); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | public function refreshScreen(): void |
| 667 | { |
| 668 | $this->scroll(); |
| 669 | |
| 670 | $this->ab = ''; |
| 671 | |
| 672 | $this->ab .= ANSI::HIDE_CURSOR; |
| 673 | $this->ab .= ANSI::RESET_CURSOR; |
| 674 | |
| 675 | $this->drawRows(); |
| 676 | $this->drawStatusBar(); |
| 677 | $this->drawMessageBar(); |
| 678 | |
| 679 | // Specify the current cursor position |
| 680 | $this->ab .= ANSI::moveCursor( |
| 681 | ($this->cursorY - $this->rowOffset) + 1, |
| 682 | ($this->renderX - $this->colOffset) + 1 |
| 683 | ); |
| 684 | |
| 685 | $this->ab .= ANSI::SHOW_CURSOR; |
| 686 | |
| 687 | echo $this->ab; |
| 688 | } |
| 689 | |
| 690 | public function setStatusMessage(string $fmt, mixed ...$args): void |
| 691 | { |
| 692 | $this->statusMsg = (count($args) > 0) |
| 693 | ? sprintf($fmt, ...$args) |
| 694 | : $fmt; |
| 695 | $this->statusMsgTime = time(); |
| 696 | } |
| 697 | |
| 698 | // ------------------------------------------------------------------------ |
| 699 | // ! Input |
| 700 | // ------------------------------------------------------------------------ |
| 701 | |
| 702 | protected function prompt(string $prompt, ?callable $callback = NULL): string |
| 703 | { |
| 704 | $buffer = ''; |
| 705 | $modifiers = KeyType::getConstList(); |
| 706 | while (TRUE) |
| 707 | { |
| 708 | $this->setStatusMessage($prompt, $buffer); |
| 709 | $this->refreshScreen(); |
| 710 | |
| 711 | $c = $this->readKey(); |
| 712 | $isModifier = in_array($c, $modifiers, TRUE); |
| 713 | |
| 714 | if ($c === KeyType::ESCAPE || ($c === KeyType::ENTER && $buffer !== '')) |
| 715 | { |
| 716 | $this->setStatusMessage(''); |
| 717 | if ($callback !== NULL) |
| 718 | { |
| 719 | $callback($buffer, $c); |
| 720 | } |
| 721 | return ($c === KeyType::ENTER) ? $buffer : ''; |
| 722 | } |
| 723 | |
| 724 | if ($c === KeyType::DEL_KEY || $c === KeyType::BACKSPACE) |
| 725 | { |
| 726 | $buffer = substr($buffer, 0, -1); |
| 727 | } |
| 728 | else if (is_ascii($c) && ( ! (is_ctrl($c) || $isModifier))) |
| 729 | { |
| 730 | $buffer .= $c; |
| 731 | } |
| 732 | |
| 733 | if ($callback !== NULL) |
| 734 | { |
| 735 | $callback($buffer, $c); |
| 736 | } |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | protected function moveCursor(string $key): void |
| 741 | { |
| 742 | $row = ($this->cursorY >= $this->numRows) |
| 743 | ? NULL |
| 744 | : $this->rows[$this->cursorY]; |
| 745 | |
| 746 | switch ($key) |
| 747 | { |
| 748 | case KeyType::ARROW_LEFT: |
| 749 | if ($this->cursorX !== 0) |
| 750 | { |
| 751 | $this->cursorX--; |
| 752 | } |
| 753 | else if ($this->cursorX > 0) |
| 754 | { |
| 755 | $this->cursorY--; |
| 756 | $this->cursorX = $this->rows[$this->cursorY]->size; |
| 757 | } |
| 758 | break; |
| 759 | |
| 760 | case KeyType::ARROW_RIGHT: |
| 761 | if ($row && $this->cursorX < $row->size) |
| 762 | { |
| 763 | $this->cursorX++; |
| 764 | } |
| 765 | else if ($row && $this->cursorX === $row->size) |
| 766 | { |
| 767 | $this->cursorY++; |
| 768 | $this->cursorX = 0; |
| 769 | } |
| 770 | break; |
| 771 | |
| 772 | case KeyType::ARROW_UP: |
| 773 | if ($this->cursorY !== 0) |
| 774 | { |
| 775 | $this->cursorY--; |
| 776 | } |
| 777 | break; |
| 778 | |
| 779 | case KeyType::ARROW_DOWN: |
| 780 | if ($this->cursorY < $this->numRows) |
| 781 | { |
| 782 | $this->cursorY++; |
| 783 | } |
| 784 | break; |
| 785 | } |
| 786 | |
| 787 | $row = ($this->cursorY >= $this->numRows) |
| 788 | ? NULL |
| 789 | : $this->rows[$this->cursorY]; |
| 790 | $rowlen = $row->size ?? 0; |
| 791 | if ($this->cursorX > $rowlen) |
| 792 | { |
| 793 | $this->cursorX = $rowlen; |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | public function processKeypress(): ?string |
| 798 | { |
| 799 | static $quit_times = KILO_QUIT_TIMES; |
| 800 | |
| 801 | $c = $this->readKey(); |
| 802 | |
| 803 | if ($c === KeyCode::NULL || $c === KeyCode::EMPTY) |
| 804 | { |
| 805 | return ''; |
| 806 | } |
| 807 | |
| 808 | switch ($c) |
| 809 | { |
| 810 | case KeyType::ENTER: |
| 811 | $this->insertNewline(); |
| 812 | break; |
| 813 | |
| 814 | case KeyCode::CTRL('q'): |
| 815 | if ($this->dirty > 0 && $quit_times > 0) |
| 816 | { |
| 817 | $this->setStatusMessage('WARNING!!! File has unsaved changes.' . |
| 818 | 'Press Ctrl-Q %d more times to quit.', $quit_times); |
| 819 | $quit_times--; |
| 820 | return ''; |
| 821 | } |
| 822 | write_stdout(ANSI::CLEAR_SCREEN); |
| 823 | write_stdout(ANSI::RESET_CURSOR); |
| 824 | return NULL; |
| 825 | break; |
| 826 | |
| 827 | case KeyCode::CTRL('s'): |
| 828 | $this->save(); |
| 829 | break; |
| 830 | |
| 831 | case KeyType::HOME_KEY: |
| 832 | $this->cursorX = 0; |
| 833 | break; |
| 834 | |
| 835 | case KeyType::END_KEY: |
| 836 | if ($this->cursorY < $this->numRows) |
| 837 | { |
| 838 | $this->cursorX = $this->rows[$this->cursorY]->size - 1; |
| 839 | } |
| 840 | break; |
| 841 | |
| 842 | case KeyCode::CTRL('f'): |
| 843 | $this->find(); |
| 844 | break; |
| 845 | |
| 846 | case KeyType::BACKSPACE: |
| 847 | case KeyType::DEL_KEY: |
| 848 | if ($c === KeyType::DEL_KEY) |
| 849 | { |
| 850 | $this->moveCursor(KeyType::ARROW_RIGHT); |
| 851 | } |
| 852 | $this->deleteChar(); |
| 853 | break; |
| 854 | |
| 855 | case KeyType::PAGE_UP: |
| 856 | case KeyType::PAGE_DOWN: |
| 857 | $this->pageUpOrDown($c); |
| 858 | break; |
| 859 | |
| 860 | case KeyType::ARROW_UP: |
| 861 | case KeyType::ARROW_DOWN: |
| 862 | case KeyType::ARROW_LEFT: |
| 863 | case KeyType::ARROW_RIGHT: |
| 864 | $this->moveCursor($c); |
| 865 | break; |
| 866 | |
| 867 | case KeyCode::CTRL('l'): |
| 868 | case KeyType::ESCAPE: |
| 869 | // Do nothing |
| 870 | break; |
| 871 | |
| 872 | default: |
| 873 | $this->insertChar($c); |
| 874 | break; |
| 875 | } |
| 876 | |
| 877 | $quit_times = KILO_QUIT_TIMES; |
| 878 | |
| 879 | return $c; |
| 880 | } |
| 881 | |
| 882 | public function pageUpOrDown(string $c): void |
| 883 | { |
| 884 | if ($c === KeyType::PAGE_UP) |
| 885 | { |
| 886 | $this->cursorY = $this->rowOffset; |
| 887 | } |
| 888 | else if ($c === KeyType::PAGE_DOWN) |
| 889 | { |
| 890 | $this->cursorY = $this->rowOffset + $this->screenRows - 1; |
| 891 | if ($this->cursorY > $this->numRows) |
| 892 | { |
| 893 | $this->cursorY = $this->numRows; |
| 894 | } |
| 895 | } |
| 896 | |
| 897 | $times = $this->screenRows; |
| 898 | for (; $times > 0; $times--) |
| 899 | { |
| 900 | $this->moveCursor($c === KeyType::PAGE_UP ? KeyType::ARROW_UP : KeyType::ARROW_DOWN); |
| 901 | } |
| 902 | } |
| 903 | |
| 904 | protected function refreshSyntax(): void |
| 905 | { |
| 906 | // Update the syntax highlighting for all the rows of the file |
| 907 | array_walk($this->rows, static fn (Row $row) => $row->updateSyntax()); |
| 908 | } |
| 909 | |
| 910 | private function refreshPHPSyntax(): void |
| 911 | { |
| 912 | if ($this->syntax->filetype !== 'PHP') |
| 913 | { |
| 914 | return; |
| 915 | } |
| 916 | |
| 917 | $this->tokens = PHP8::getTokens($this->rowsToString()); |
| 918 | $this->refreshSyntax(); |
| 919 | } |
| 920 | } |