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| 1 | <?php declare(strict_types=1); |
| 2 | |
| 3 | namespace Aviat\Kilo; |
| 4 | |
| 5 | use Aviat\Kilo\Enum\Highlight; |
| 6 | use Aviat\Kilo\Enum\RawKeyCode; |
| 7 | |
| 8 | /** |
| 9 | * @property-read int $size |
| 10 | * @property-read int $rsize |
| 11 | * @property-read string $chars |
| 12 | */ |
| 13 | class Row { |
| 14 | // use Traits\MagicProperties; |
| 15 | |
| 16 | /** |
| 17 | * The version of the row to be displayed (where tabs are converted to display spaces) |
| 18 | */ |
| 19 | public string $render = ''; |
| 20 | |
| 21 | /** |
| 22 | * The mapping of characters to their highlighting type |
| 23 | */ |
| 24 | public array $hl = []; |
| 25 | |
| 26 | /** |
| 27 | * Are we in the middle of highlighting a multi-line comment? |
| 28 | */ |
| 29 | private bool $hlOpenComment = FALSE; |
| 30 | |
| 31 | /** |
| 32 | * Create a row in the current document |
| 33 | * |
| 34 | * @param Document $parent |
| 35 | * @param string $chars |
| 36 | * @param int $idx |
| 37 | * @return self |
| 38 | */ |
| 39 | public static function new(Document $parent, string $chars, int $idx): self |
| 40 | { |
| 41 | return new self( |
| 42 | $parent, |
| 43 | $chars, |
| 44 | $idx, |
| 45 | ); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Create an empty Row |
| 50 | * |
| 51 | * @return self |
| 52 | */ |
| 53 | public static function default(): self |
| 54 | { |
| 55 | return new self( |
| 56 | Document::new(), |
| 57 | '', |
| 58 | 0, |
| 59 | ); |
| 60 | } |
| 61 | |
| 62 | private function __construct( |
| 63 | /** |
| 64 | * The document that this row belongs to |
| 65 | */ |
| 66 | private Document $parent, |
| 67 | |
| 68 | /** |
| 69 | * @var string The raw characters in the row |
| 70 | */ |
| 71 | private string $chars, |
| 72 | |
| 73 | /** |
| 74 | * @var int The line number of the current row |
| 75 | */ |
| 76 | public int $idx, |
| 77 | ) {} |
| 78 | |
| 79 | public function __get(string $name): mixed |
| 80 | { |
| 81 | return match ($name) |
| 82 | { |
| 83 | 'size' => strlen($this->chars), |
| 84 | 'rsize' => strlen($this->render), |
| 85 | 'chars' => $this->chars, |
| 86 | default => NULL, |
| 87 | }; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Convert the row contents to a string for saving |
| 92 | * |
| 93 | * @return string |
| 94 | */ |
| 95 | public function __toString(): string |
| 96 | { |
| 97 | return $this->chars . "\n"; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Set the properties to display for var_dump |
| 102 | * |
| 103 | * @return array |
| 104 | */ |
| 105 | public function __debugInfo(): array |
| 106 | { |
| 107 | return [ |
| 108 | 'size' => $this->size, |
| 109 | 'rsize' => $this->rsize, |
| 110 | 'chars' => $this->chars, |
| 111 | 'render' => $this->render, |
| 112 | 'hl' => $this->hl, |
| 113 | 'hlOpenComment' => $this->hlOpenComment, |
| 114 | ]; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Is this row a valid part of a document? |
| 119 | * |
| 120 | * @return bool |
| 121 | */ |
| 122 | public function isValid(): bool |
| 123 | { |
| 124 | return ! $this->parent->isEmpty(); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Insert the string or character $c at index $at |
| 129 | * |
| 130 | * @param int $at |
| 131 | * @param string $c |
| 132 | */ |
| 133 | public function insert(int $at, string $c): void |
| 134 | { |
| 135 | if ($at < 0 || $at > $this->size) |
| 136 | { |
| 137 | $this->append($c); |
| 138 | return; |
| 139 | } |
| 140 | |
| 141 | // Safely insert into arbitrary position in the existing string |
| 142 | $this->chars = substr($this->chars, 0, $at) . $c . substr($this->chars, $at); |
| 143 | $this->update(); |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Append $s to the current row |
| 148 | * |
| 149 | * @param string $s |
| 150 | */ |
| 151 | public function append(string $s): void |
| 152 | { |
| 153 | $this->chars .= $s; |
| 154 | $this->update(); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Delete the character at the specified index |
| 159 | * |
| 160 | * @param int $at |
| 161 | */ |
| 162 | public function delete(int $at): void |
| 163 | { |
| 164 | if ($at < 0 || $at >= $this->size) |
| 165 | { |
| 166 | return; |
| 167 | } |
| 168 | |
| 169 | $this->chars = substr_replace($this->chars, '', $at, 1); |
| 170 | $this->update(); |
| 171 | } |
| 172 | |
| 173 | public function setChars(string $chars): void |
| 174 | { |
| 175 | $this->chars = $chars; |
| 176 | $this->update(); |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Convert tabs to spaces for display, and update syntax highlighting |
| 181 | */ |
| 182 | public function update(): void |
| 183 | { |
| 184 | $this->render = tabs_to_spaces($this->chars); |
| 185 | $this->highlight(); |
| 186 | } |
| 187 | |
| 188 | // ------------------------------------------------------------------------ |
| 189 | // ! Syntax Highlighting |
| 190 | // ------------------------------------------------------------------------ |
| 191 | |
| 192 | /** |
| 193 | * Parse the current file to apply syntax highlighting |
| 194 | */ |
| 195 | public function highlight(): void |
| 196 | { |
| 197 | $this->hl = array_fill(0, $this->rsize, Highlight::NORMAL); |
| 198 | |
| 199 | if ($this->parent->fileType->name === 'PHP') |
| 200 | { |
| 201 | $this->highlightPHP(); |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | $syntax = $this->parent->fileType->syntax; |
| 206 | |
| 207 | $mcs = $syntax->multiLineCommentStart; |
| 208 | $mce = $syntax->multiLineCommentEnd; |
| 209 | |
| 210 | $mcsLen = strlen($mcs); |
| 211 | $mceLen = strlen($mce); |
| 212 | |
| 213 | $inString = ''; |
| 214 | $inComment = ($this->idx > 0 && $this->parent->rows[$this->idx - 1]->hlOpenComment); |
| 215 | |
| 216 | $i = 0; |
| 217 | |
| 218 | while ($i < $this->rsize) |
| 219 | { |
| 220 | // Multi-line comments |
| 221 | if ($syntax->mlComments() && $inString === '') |
| 222 | { |
| 223 | if ($inComment) |
| 224 | { |
| 225 | $this->hl[$i] = Highlight::ML_COMMENT; |
| 226 | if (substr($this->render, $i, $mceLen) === $mce) |
| 227 | { |
| 228 | array_replace_range($this->hl, $i, $mceLen, Highlight::ML_COMMENT); |
| 229 | $i += $mceLen; |
| 230 | $inComment = FALSE; |
| 231 | continue; |
| 232 | } |
| 233 | |
| 234 | $i++; |
| 235 | continue; |
| 236 | } |
| 237 | |
| 238 | if (substr($this->render, $i, $mcsLen) === $mcs) |
| 239 | { |
| 240 | array_replace_range($this->hl, $i, $mcsLen, Highlight::ML_COMMENT); |
| 241 | $i += $mcsLen; |
| 242 | $inComment = TRUE; |
| 243 | continue; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | if ( |
| 248 | $this->highlightComment($i, $syntax) |
| 249 | || $this->highlightPrimaryKeywords($i, $syntax) |
| 250 | || $this->highlightSecondaryKeywords($i, $syntax) |
| 251 | || $this->highlightCharacter($i, $syntax) |
| 252 | || $this->highlightString($i, $syntax) |
| 253 | || $this->highlightNumber($i, $syntax) |
| 254 | || $this->highlightOperators($i, $syntax) |
| 255 | || $this->highlightCommonOperators($i) |
| 256 | || $this->highlightCommonDelimeters($i) |
| 257 | ) { |
| 258 | $i++; |
| 259 | continue; |
| 260 | } |
| 261 | |
| 262 | $i++; |
| 263 | } |
| 264 | |
| 265 | $changed = $this->hlOpenComment !== $inComment; |
| 266 | $this->hlOpenComment = $inComment; |
| 267 | if ($changed && $this->idx + 1 < $this->parent->numRows) |
| 268 | { |
| 269 | $this->parent->rows[$this->idx + 1]->highlight(); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | protected function highlightNumber(int &$i, Syntax $opts): bool |
| 274 | { |
| 275 | $char = $this->render[$i]; |
| 276 | if ($opts->numbers() && is_digit($char)) |
| 277 | { |
| 278 | if ($i > 0) |
| 279 | { |
| 280 | $prevChar = $this->render[$i - 1]; |
| 281 | if ( ! is_separator($prevChar)) |
| 282 | { |
| 283 | return false; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | while (true) |
| 288 | { |
| 289 | $this->hl[$i] = Highlight::NUMBER; |
| 290 | $i++; |
| 291 | |
| 292 | if ($i < strlen($this->render)) |
| 293 | { |
| 294 | $nextChar = $this->render[$i]; |
| 295 | if ($nextChar !== '.' && ! is_digit($nextChar)) |
| 296 | { |
| 297 | break; |
| 298 | } |
| 299 | } |
| 300 | else |
| 301 | { |
| 302 | break; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | return true; |
| 307 | } |
| 308 | |
| 309 | return false; |
| 310 | } |
| 311 | |
| 312 | protected function highlightWord(int &$i, array $keywords, int $syntaxType): bool |
| 313 | { |
| 314 | if ($i > 0) |
| 315 | { |
| 316 | $prevChar = $this->render[$i - 1]; |
| 317 | if ( ! is_separator($prevChar)) |
| 318 | { |
| 319 | return false; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | foreach ($keywords as $k) |
| 324 | { |
| 325 | $klen = strlen($k); |
| 326 | $nextCharOffset = $i + $klen; |
| 327 | $isEndOfLine = $nextCharOffset >= $this->rsize; |
| 328 | $nextChar = ($isEndOfLine) ? RawKeyCode::NULL : $this->render[$nextCharOffset]; |
| 329 | |
| 330 | if (substr($this->render, $i, $klen) === $k && is_separator($nextChar)) |
| 331 | { |
| 332 | array_replace_range($this->hl, $i, $klen, $syntaxType); |
| 333 | $i += $klen - 1; |
| 334 | |
| 335 | return true; |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | return false; |
| 340 | } |
| 341 | |
| 342 | protected function highlightChar(int &$i, array $chars, int $syntaxType): bool |
| 343 | { |
| 344 | $char = $this->render[$i]; |
| 345 | |
| 346 | if (in_array($char, $chars, TRUE)) |
| 347 | { |
| 348 | $this->hl[$i] = $syntaxType; |
| 349 | $i += 1; |
| 350 | |
| 351 | return true; |
| 352 | } |
| 353 | |
| 354 | return false; |
| 355 | } |
| 356 | |
| 357 | protected function highlightPrimaryKeywords(int &$i, Syntax $opts): bool |
| 358 | { |
| 359 | return $this->highlightWord($i, $opts->keywords1, Highlight::KEYWORD1); |
| 360 | } |
| 361 | |
| 362 | protected function highlightSecondaryKeywords(int &$i, Syntax $opts): bool |
| 363 | { |
| 364 | return $this->highlightWord($i, $opts->keywords2, Highlight::KEYWORD2); |
| 365 | } |
| 366 | |
| 367 | protected function highlightOperators(int &$i, Syntax $opts): bool |
| 368 | { |
| 369 | return $this->highlightWord($i, $opts->operators, Highlight::OPERATOR); |
| 370 | } |
| 371 | |
| 372 | protected function highlightCommonOperators(int &$i): bool |
| 373 | { |
| 374 | return $this->highlightChar( |
| 375 | $i, |
| 376 | ['+', '-', '*', '/', '<', '^', '>', '%', '=', ':', ',', ';', '&', '~'], |
| 377 | Highlight::OPERATOR |
| 378 | ); |
| 379 | } |
| 380 | |
| 381 | protected function highlightCommonDelimeters(int &$i): bool |
| 382 | { |
| 383 | return $this->highlightChar( |
| 384 | $i, |
| 385 | ['{', '}', '[', ']', '(', ')'], |
| 386 | Highlight::DELIMITER |
| 387 | ); |
| 388 | } |
| 389 | |
| 390 | protected function highlightCharacter(int &$i, Syntax $opts): bool |
| 391 | { |
| 392 | if (($i + 1) >= $this->rsize) |
| 393 | { |
| 394 | return false; |
| 395 | } |
| 396 | |
| 397 | $char = $this->render[$i]; |
| 398 | $nextChar = $this->render[$i + 1]; |
| 399 | |
| 400 | if ($opts->characters() && $char === "'") |
| 401 | { |
| 402 | $offset = ($nextChar === '\\') ? $i + 2 : $i + 1; |
| 403 | $closingIndex = strpos($this->render, "'", $offset); |
| 404 | if ($closingIndex === false) |
| 405 | { |
| 406 | return false; |
| 407 | } |
| 408 | |
| 409 | $closingChar = $this->render[$closingIndex]; |
| 410 | if ($closingChar === "'") |
| 411 | { |
| 412 | array_replace_range($this->hl, $i, $closingIndex - $i + 1, Highlight::CHARACTER); |
| 413 | $i = $closingIndex + 1; |
| 414 | |
| 415 | return true; |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | return false; |
| 420 | } |
| 421 | |
| 422 | protected function highlightComment(int &$i, Syntax $opts): bool |
| 423 | { |
| 424 | if ( ! $opts->comments()) |
| 425 | { |
| 426 | return false; |
| 427 | } |
| 428 | |
| 429 | $scs = $opts->singleLineCommentStart; |
| 430 | $scsLen = strlen($scs); |
| 431 | |
| 432 | if ($scsLen > 0 && substr($this->render, $i, $scsLen) === $scs) |
| 433 | { |
| 434 | array_replace_range($this->hl, $i, $this->rsize - $i, Highlight::COMMENT); |
| 435 | $i = $this->rsize; |
| 436 | |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | return false; |
| 441 | } |
| 442 | |
| 443 | protected function highlightString(int &$i, Syntax $opts): bool |
| 444 | { |
| 445 | $char = $this->render[$i]; |
| 446 | |
| 447 | // If there's a separate character type, highlight that separately |
| 448 | if ($opts->hasChar() && $char === "'") |
| 449 | { |
| 450 | return false; |
| 451 | } |
| 452 | |
| 453 | if ($opts->strings() && $char === '"' || $char === '\'') |
| 454 | { |
| 455 | $quote = $char; |
| 456 | $this->hl[$i] = Highlight::STRING; |
| 457 | $i++; |
| 458 | |
| 459 | while ($i < $this->rsize) |
| 460 | { |
| 461 | $char = $this->render[$i]; |
| 462 | $this->hl[$i] = Highlight::STRING; |
| 463 | |
| 464 | // Check for escaped character |
| 465 | if ($char === '\\' && $i+1 < $this->rsize) |
| 466 | { |
| 467 | $this->hl[$i + 1] = Highlight::STRING; |
| 468 | $i += 2; |
| 469 | continue; |
| 470 | } |
| 471 | |
| 472 | // End of the string! |
| 473 | if ($char === $quote) |
| 474 | { |
| 475 | $i++; |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | $i++; |
| 480 | } |
| 481 | |
| 482 | return true; |
| 483 | } |
| 484 | |
| 485 | return false; |
| 486 | } |
| 487 | |
| 488 | protected function highlightPHP(): void |
| 489 | { |
| 490 | $rowNum = $this->idx + 1; |
| 491 | |
| 492 | $hasRowTokens = array_key_exists($rowNum, $this->parent->tokens); |
| 493 | |
| 494 | if ( ! ( |
| 495 | $hasRowTokens && |
| 496 | $this->idx < $this->parent->numRows |
| 497 | )) |
| 498 | { |
| 499 | return; |
| 500 | } |
| 501 | |
| 502 | $tokens = $this->parent->tokens[$rowNum]; |
| 503 | |
| 504 | $inComment = ($this->idx > 0 && $this->parent->rows[$this->idx - 1]->hlOpenComment); |
| 505 | |
| 506 | // Keep track of where you are in the line, so that |
| 507 | // multiples of the same tokens can be effectively matched |
| 508 | $offset = 0; |
| 509 | |
| 510 | foreach ($tokens as $token) |
| 511 | { |
| 512 | if ($offset >= $this->rsize) |
| 513 | { |
| 514 | break; |
| 515 | } |
| 516 | |
| 517 | // A multi-line comment can end in the middle of a line... |
| 518 | if ($inComment) |
| 519 | { |
| 520 | // Try looking for the end of the comment first |
| 521 | $commentEnd = strpos($this->render, '*/'); |
| 522 | if ($commentEnd !== FALSE) |
| 523 | { |
| 524 | $inComment = FALSE; |
| 525 | array_replace_range($this->hl, 0, $commentEnd + 2, Highlight::ML_COMMENT); |
| 526 | $offset = $commentEnd; |
| 527 | continue; |
| 528 | } |
| 529 | |
| 530 | // Otherwise, just set the whole row |
| 531 | $this->hl = array_fill(0, $this->rsize, Highlight::ML_COMMENT); |
| 532 | $this->hl[$offset] = Highlight::ML_COMMENT; |
| 533 | break; |
| 534 | } |
| 535 | |
| 536 | $char = $token['char']; |
| 537 | $charLen = strlen($char); |
| 538 | if ($charLen === 0 || $offset >= $this->rsize) |
| 539 | { |
| 540 | continue; |
| 541 | } |
| 542 | $charStart = strpos($this->render, $char, $offset); |
| 543 | if ($charStart === FALSE) |
| 544 | { |
| 545 | continue; |
| 546 | } |
| 547 | $charEnd = $charStart + $charLen; |
| 548 | |
| 549 | // Start of multiline comment/single line comment |
| 550 | if (in_array($token['type'], [T_DOC_COMMENT, T_COMMENT], TRUE)) |
| 551 | { |
| 552 | // Single line comments |
| 553 | if (str_has($char, '//') || str_has($char, '#')) |
| 554 | { |
| 555 | array_replace_range($this->hl, $charStart, $charLen, Highlight::COMMENT); |
| 556 | break; |
| 557 | } |
| 558 | |
| 559 | // Start of multi-line comment |
| 560 | $start = strpos($this->render, '/*', $offset); |
| 561 | $end = strpos($this->render, '*/', $offset); |
| 562 | $hasStart = $start !== FALSE; |
| 563 | $hasEnd = $end !== FALSE; |
| 564 | |
| 565 | if ($hasStart) |
| 566 | { |
| 567 | if ($hasEnd) |
| 568 | { |
| 569 | $len = $end - $start + 2; |
| 570 | array_replace_range($this->hl, $start, $len, Highlight::ML_COMMENT); |
| 571 | $inComment = FALSE; |
| 572 | } |
| 573 | else |
| 574 | { |
| 575 | $inComment = TRUE; |
| 576 | array_replace_range($this->hl, $start, $charLen - $offset, Highlight::ML_COMMENT); |
| 577 | $offset = $start + $charLen - $offset; |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | if ($inComment) |
| 582 | { |
| 583 | break; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | $tokenHighlight = Highlight::fromPHPToken($token['type']); |
| 588 | $charHighlight = Highlight::fromPHPChar(trim($token['char'])); |
| 589 | |
| 590 | $highlight = match(true) { |
| 591 | // Matches a predefined PHP token |
| 592 | $token['type'] !== T_RAW && $tokenHighlight !== Highlight::NORMAL |
| 593 | => $tokenHighlight, |
| 594 | |
| 595 | // Matches a specific syntax character |
| 596 | $charHighlight !== Highlight::NORMAL => $charHighlight, |
| 597 | |
| 598 | default => Highlight::NORMAL, |
| 599 | }; |
| 600 | |
| 601 | if ($highlight !== Highlight::NORMAL) |
| 602 | { |
| 603 | array_replace_range($this->hl, $charStart, $charLen, $highlight); |
| 604 | $offset = $charEnd; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | $changed = $this->hlOpenComment !== $inComment; |
| 609 | $this->hlOpenComment = $inComment; |
| 610 | if ($changed && ($this->idx + 1) < $this->parent->numRows) |
| 611 | { |
| 612 | $this->parent->rows[$this->idx + 1]->highlight(); |
| 613 | } |
| 614 | } |
| 615 | } |