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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (https://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@noladev.com> |
| 7 | * @copyright Copyright (c) 2009-2026 NOLA Interactive, LLC. |
| 8 | * @license https://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Pdf\Build\PdfObject; |
| 15 | |
| 16 | /** |
| 17 | * Pdf page object class |
| 18 | * |
| 19 | * @category Pop |
| 20 | * @package Pop\Pdf |
| 21 | * @author Nick Sagona, III <dev@noladev.com> |
| 22 | * @copyright Copyright (c) 2009-2026 NOLA Interactive, LLC. |
| 23 | * @license https://www.popphp.org/license New BSD License |
| 24 | * @version 5.2.7 |
| 25 | */ |
| 26 | class PageObject extends AbstractObject |
| 27 | { |
| 28 | |
| 29 | /** |
| 30 | * PDF page object index |
| 31 | * @var ?int |
| 32 | */ |
| 33 | protected ?int $index = 4; |
| 34 | |
| 35 | /** |
| 36 | * PDF page object parent index |
| 37 | * @var ?int |
| 38 | */ |
| 39 | protected ?int $parent = 2; |
| 40 | |
| 41 | /** |
| 42 | * PDF page object width |
| 43 | * @var int |
| 44 | */ |
| 45 | protected int $width = 612; |
| 46 | |
| 47 | /** |
| 48 | * PDF page object height |
| 49 | * @var int |
| 50 | */ |
| 51 | protected int $height = 792; |
| 52 | |
| 53 | /** |
| 54 | * PDF page object current content object index |
| 55 | * @var ?int |
| 56 | */ |
| 57 | protected ?int $currentContentIndex = null; |
| 58 | |
| 59 | /** |
| 60 | * PDF page object annotation object indices |
| 61 | * @var array |
| 62 | */ |
| 63 | protected array $annots = []; |
| 64 | |
| 65 | /** |
| 66 | * PDF page object content object indices |
| 67 | * @var array |
| 68 | */ |
| 69 | protected array $content = []; |
| 70 | |
| 71 | /** |
| 72 | * PDF page object XObject references |
| 73 | * @var array |
| 74 | */ |
| 75 | protected array $xObjects = []; |
| 76 | |
| 77 | /** |
| 78 | * PDF page object font object references |
| 79 | * @var array |
| 80 | */ |
| 81 | protected array $fonts = []; |
| 82 | |
| 83 | /** |
| 84 | * Constructor |
| 85 | * |
| 86 | * Instantiate a PDF page object, defaults to letter size. |
| 87 | * |
| 88 | * @param mixed $width |
| 89 | * @param mixed $height |
| 90 | * @param int $index |
| 91 | */ |
| 92 | public function __construct(mixed $width = 612, mixed$height = 792, int $index = 4) |
| 93 | { |
| 94 | $this->setWidth($width); |
| 95 | $this->setHeight($height); |
| 96 | $this->setIndex($index); |
| 97 | $this->setData("\n[{page_index}] 0 obj\n<</Type/Page/Parent [{parent}] 0 R[{annotations}]/MediaBox[0 0 " . |
| 98 | "[{width}] [{height}]][{content_objects}]/Resources" . |
| 99 | "<</ProcSet[/PDF/Text/ImageB/ImageC/ImageI][{xobjects}][{fonts}]>>>>\nendobj\n"); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Parse a page object from a string |
| 104 | * |
| 105 | * @param string $stream |
| 106 | * @return PageObject |
| 107 | */ |
| 108 | public static function parse(string $stream): PageObject |
| 109 | { |
| 110 | $page = new self(); |
| 111 | $page->setIndex(substr($stream, 0, strpos($stream, ' '))); |
| 112 | |
| 113 | // Determine the page parent object index. |
| 114 | $parent = substr($stream, (strpos($stream, '/Parent') + 7)); |
| 115 | $parent = trim(substr($parent, 0, strpos($parent, '0 R'))); |
| 116 | $page->setParentIndex($parent); |
| 117 | |
| 118 | // Determine the page width and height. |
| 119 | $dims = substr($stream, (strpos($stream, '/MediaBox') + 9)); |
| 120 | $dims = substr($dims, 0, strpos($dims, ']')); |
| 121 | $dims = trim(str_replace('[', '', $dims)); |
| 122 | $dims = explode(' ', $dims); |
| 123 | $page->setWidth($dims[2]); |
| 124 | $page->setHeight($dims[3]); |
| 125 | |
| 126 | // Determine the page content objects. |
| 127 | if (str_contains($stream, '/Contents')) { |
| 128 | $contents = substr($stream, (strpos($stream, '/Contents') + 9)); |
| 129 | $contents = $page->getDictionaryReferences($contents); |
| 130 | foreach ($contents as $content) { |
| 131 | $page->addContentIndex($content); |
| 132 | } |
| 133 | |
| 134 | // Set placeholder |
| 135 | $contents = substr($stream, (strpos($stream, '/Contents') + 9)); |
| 136 | if (str_contains($contents, '[')) { |
| 137 | $contents = substr($contents, 0, (strpos($contents, ']') + 1)); |
| 138 | $stream = str_replace($contents, '[{content_objects}]', $stream); |
| 139 | } else { |
| 140 | $contents = (str_contains($contents, '/')) ? |
| 141 | substr($contents, 0, strpos($contents, '/')) : |
| 142 | substr($contents, 0, strpos($contents, '>')); |
| 143 | $stream = str_replace($contents, '[{content_objects}]', $stream); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | // If they exist, determine the page annotation objects. |
| 148 | if (str_contains($stream, '/Annots')) { |
| 149 | $annots = substr($stream, (strpos($stream, '/Annots') + 7)); |
| 150 | $annots = $page->getDictionaryReferences($annots); |
| 151 | foreach ($annots as $annot) { |
| 152 | $page->addAnnotIndex($annot); |
| 153 | } |
| 154 | |
| 155 | // Set placeholder |
| 156 | $annots = substr($stream, (strpos($stream, '/Annots') + 7)); |
| 157 | if (str_contains($annots, '[')) { |
| 158 | $annots = substr($annots, 0, (strpos($annots, ']') + 1)); |
| 159 | $stream = str_replace($annots, '[{annotations}]', $stream); |
| 160 | } else { |
| 161 | $annots = (str_contains($annots, '/')) ? |
| 162 | substr($annots, 0, strpos($annots, '/')) : |
| 163 | substr($annots, 0, strpos($annots, '>')); |
| 164 | $stream = str_replace($annots, '[{annotations}]', $stream); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | // If they exist, determine the page font references. |
| 169 | if (str_contains($stream, '/Font')) { |
| 170 | $fonts = substr($stream, strpos($stream, 'Font')); |
| 171 | $fonts = substr($fonts, 0, (strpos($fonts, '>>') + 2)); |
| 172 | $stream = str_replace('/' . $fonts, '[{fonts}]', $stream); |
| 173 | $fonts = str_replace('Font<<', '', $fonts); |
| 174 | $fonts = str_replace('>>', '', $fonts); |
| 175 | $fonts = explode('/', $fonts); |
| 176 | foreach ($fonts as $value) { |
| 177 | if ($value != '') { |
| 178 | $page->addFontReference('/' . $value); |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | // If they exist, determine the page XObjects references. |
| 184 | if (str_contains($stream, '/XObject')) { |
| 185 | $xo = substr($stream, strpos($stream, 'XObject')); |
| 186 | $xo = substr($xo, 0, (strpos($xo, '>>') + 2)); |
| 187 | $stream = str_replace('/' . $xo, '[{xobjects}]', $stream); |
| 188 | $xo = str_replace('XObject<<', '', $xo); |
| 189 | $xo = str_replace('>>', '', $xo); |
| 190 | $xo = explode('/', $xo); |
| 191 | foreach ($xo as $value) { |
| 192 | if ($value != '') { |
| 193 | $page->addXObjectReference('/' . $value); |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | // If they exist, determine the page graphic states. |
| 199 | if (str_contains($stream, '/ExtGState')) { |
| 200 | $gState = substr($stream, strpos($stream, 'ExtGState')); |
| 201 | $gState = '/' . substr($gState, 0, (strpos($gState, '>>') + 2)); |
| 202 | } else { |
| 203 | $gState = ''; |
| 204 | } |
| 205 | |
| 206 | // If any groups exist |
| 207 | if (str_contains($stream, '/Group')) { |
| 208 | $group = substr($stream, strpos($stream, 'Group')); |
| 209 | $group = '/' . substr($group, 0, (strpos($group, '>>') + 2)); |
| 210 | } else { |
| 211 | $group = ''; |
| 212 | } |
| 213 | |
| 214 | // If resources exists |
| 215 | if (str_contains($stream, '/Resources')) { |
| 216 | $resources = substr($stream, strpos($stream, 'Resources')); |
| 217 | if (str_contains($resources, ' R')) { |
| 218 | $resources = '/' . substr($resources, 0, (strpos($resources, ' R') + 2)); |
| 219 | } else if (str_contains($resources, '>>')) { |
| 220 | $resources = '/' . substr($resources, 0, (strpos($resources, '>>') + 2)); |
| 221 | } else { |
| 222 | $resources = "/Resources<</ProcSet[/PDF/Text/ImageB/ImageC/ImageI][{xobjects}][{fonts}]{$gState}>>"; |
| 223 | } |
| 224 | } else { |
| 225 | $resources = "/Resources<</ProcSet[/PDF/Text/ImageB/ImageC/ImageI][{xobjects}][{fonts}]{$gState}>>"; |
| 226 | } |
| 227 | |
| 228 | if (substr_count($resources, '<<') > substr_count($resources, '>>')) { |
| 229 | $resources .= str_repeat('>>', (substr_count($resources, '<<') - substr_count($resources, '>>'))); |
| 230 | } |
| 231 | |
| 232 | $page->setData("\n[{page_index}] 0 obj\n<</Type/Page/Parent [{parent}] 0 R[{annotations}]/MediaBox" . |
| 233 | "[0 0 [{width}] [{height}]]{$group}[{content_objects}]{$resources}>>\nendobj\n"); |
| 234 | |
| 235 | return $page; |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Set the page object parent index |
| 240 | * |
| 241 | * @param int $parent |
| 242 | * @return PageObject |
| 243 | */ |
| 244 | public function setParentIndex(int $parent): PageObject |
| 245 | { |
| 246 | $this->parent = $parent; |
| 247 | return $this; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Set the page object width |
| 252 | * |
| 253 | * @param mixed $width |
| 254 | * @return PageObject |
| 255 | */ |
| 256 | public function setWidth(mixed $width): PageObject |
| 257 | { |
| 258 | $this->width = $width; |
| 259 | return $this; |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * Set the page object height |
| 264 | * |
| 265 | * @param mixed $height |
| 266 | * @return PageObject |
| 267 | */ |
| 268 | public function setHeight(mixed $height): PageObject |
| 269 | { |
| 270 | $this->height = $height; |
| 271 | return $this; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Set the page object annotation indices |
| 276 | * |
| 277 | * @param array $annots |
| 278 | * @return PageObject |
| 279 | */ |
| 280 | public function setAnnots(array $annots): PageObject |
| 281 | { |
| 282 | $this->annots = $annots; |
| 283 | return $this; |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * Set the page object content object indices |
| 288 | * |
| 289 | * @param array $content |
| 290 | * @return PageObject |
| 291 | */ |
| 292 | public function setContent(array $content): PageObject |
| 293 | { |
| 294 | $this->content = $content; |
| 295 | return $this; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Set the page object XObject references |
| 300 | * |
| 301 | * @param array $xObjects |
| 302 | * @return PageObject |
| 303 | */ |
| 304 | public function setXObjects(array $xObjects): PageObject |
| 305 | { |
| 306 | $this->xObjects = []; |
| 307 | foreach ($xObjects as $xObject) { |
| 308 | $this->addXObjectReference($xObject); |
| 309 | } |
| 310 | return $this; |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Set the page object font references |
| 315 | * |
| 316 | * @param array $fonts |
| 317 | * @return PageObject |
| 318 | */ |
| 319 | public function setFonts(array $fonts): PageObject |
| 320 | { |
| 321 | $this->fonts = []; |
| 322 | foreach ($fonts as $font) { |
| 323 | $this->addFontReference($font); |
| 324 | } |
| 325 | return $this; |
| 326 | } |
| 327 | |
| 328 | /** |
| 329 | * Set the page object current content object index |
| 330 | * |
| 331 | * @param mixed $i |
| 332 | * @return PageObject |
| 333 | */ |
| 334 | public function setCurrentContentIndex(mixed $i = null): PageObject |
| 335 | { |
| 336 | $this->currentContentIndex = ($i !== null) ? (int)$i : null; |
| 337 | return $this; |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * Add annotation index |
| 342 | * |
| 343 | * @param int $i |
| 344 | * @return PageObject |
| 345 | */ |
| 346 | public function addAnnotIndex(int $i): PageObject |
| 347 | { |
| 348 | $this->annots[] = $i; |
| 349 | return $this; |
| 350 | } |
| 351 | |
| 352 | /** |
| 353 | * Add content object index |
| 354 | * |
| 355 | * @param int $i |
| 356 | * @return PageObject |
| 357 | */ |
| 358 | public function addContentIndex(int $i): PageObject |
| 359 | { |
| 360 | $this->content[] = $i; |
| 361 | $this->setCurrentContentIndex($i); |
| 362 | return $this; |
| 363 | } |
| 364 | |
| 365 | /** |
| 366 | * Add XObject reference |
| 367 | * |
| 368 | * @param string $xObject |
| 369 | * @return PageObject |
| 370 | */ |
| 371 | public function addXObjectReference(string $xObject): PageObject |
| 372 | { |
| 373 | $i = substr($xObject, (strpos($xObject, ' ') + 1)); |
| 374 | $i = substr($i, 0, strpos($i, ' ')); |
| 375 | $this->xObjects[(int)$i] = $xObject; |
| 376 | return $this; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Add font reference |
| 381 | * |
| 382 | * @param string $font |
| 383 | * @return PageObject |
| 384 | */ |
| 385 | public function addFontReference(string $font): PageObject |
| 386 | { |
| 387 | $i = substr($font, (strpos($font, ' ') + 1)); |
| 388 | $i = substr($i, 0, strpos($i, ' ')); |
| 389 | $this->fonts[(int)$i] = $font; |
| 390 | return $this; |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * Get the page object parent index |
| 395 | * |
| 396 | * @return ?int |
| 397 | */ |
| 398 | public function getParentIndex(): ?int |
| 399 | { |
| 400 | return $this->parent; |
| 401 | } |
| 402 | |
| 403 | /** |
| 404 | * Get the page object width |
| 405 | * |
| 406 | * @return mixed |
| 407 | */ |
| 408 | public function getWidth(): mixed |
| 409 | { |
| 410 | return $this->width; |
| 411 | } |
| 412 | |
| 413 | /** |
| 414 | * Get the page object height |
| 415 | * |
| 416 | * @return mixed |
| 417 | */ |
| 418 | public function getHeight(): mixed |
| 419 | { |
| 420 | return $this->height; |
| 421 | } |
| 422 | |
| 423 | /** |
| 424 | * Get the page object current content object index |
| 425 | * |
| 426 | * @return ?int |
| 427 | */ |
| 428 | public function getCurrentContentIndex(): ?int |
| 429 | { |
| 430 | return $this->currentContentIndex; |
| 431 | } |
| 432 | |
| 433 | /** |
| 434 | * Get the page object annotation indices |
| 435 | * |
| 436 | * @return array |
| 437 | */ |
| 438 | public function getAnnots(): array |
| 439 | { |
| 440 | return $this->annots; |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * Get the page object content object indices |
| 445 | * |
| 446 | * @return array |
| 447 | */ |
| 448 | public function getContent(): array |
| 449 | { |
| 450 | return $this->content; |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * Get the page object XObject references |
| 455 | * |
| 456 | * @return array |
| 457 | */ |
| 458 | public function getXObjects(): array |
| 459 | { |
| 460 | return $this->xObjects; |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * Get the page object font references |
| 465 | * |
| 466 | * @return array |
| 467 | */ |
| 468 | public function getFonts(): array |
| 469 | { |
| 470 | return $this->fonts; |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * Determine if the page object has an annotation index |
| 475 | * |
| 476 | * @param int $i |
| 477 | * @return bool |
| 478 | */ |
| 479 | public function hasAnnot(int $i): bool |
| 480 | { |
| 481 | return (isset($this->annots[$i])); |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * Determine if the page object has a content index |
| 486 | * |
| 487 | * @param int $i |
| 488 | * @return bool |
| 489 | */ |
| 490 | public function hasContent(int $i): bool |
| 491 | { |
| 492 | return (isset($this->content[$i])); |
| 493 | } |
| 494 | |
| 495 | /** |
| 496 | * Method to print the page object. |
| 497 | * |
| 498 | * @return string |
| 499 | */ |
| 500 | public function __toString(): string |
| 501 | { |
| 502 | $annots = ''; |
| 503 | $xObjects = ''; |
| 504 | $fonts = ''; |
| 505 | |
| 506 | // Format the annotations. |
| 507 | if (count($this->annots) > 0) { |
| 508 | $annots = '/Annots['; |
| 509 | $annots .= implode(" 0 R ", $this->annots); |
| 510 | $annots .= " 0 R]"; |
| 511 | } |
| 512 | |
| 513 | // Format the xobjects. |
| 514 | if (count($this->xObjects) > 0) { |
| 515 | $xObjects = '/XObject<<'; |
| 516 | $xObjects .= implode('', $this->xObjects); |
| 517 | $xObjects .= '>>'; |
| 518 | } |
| 519 | |
| 520 | // Format the fonts. |
| 521 | if (count($this->fonts) > 0) { |
| 522 | $fonts = '/Font<<'; |
| 523 | $fonts .= implode('', $this->fonts); |
| 524 | $fonts .= '>>'; |
| 525 | } |
| 526 | |
| 527 | // Swap out the placeholders. |
| 528 | $obj = str_replace( |
| 529 | ['[{page_index}]', '[{parent}]', '[{width}]', '[{height}]'], |
| 530 | [$this->index, $this->parent, $this->width, $this->height], |
| 531 | $this->data |
| 532 | ); |
| 533 | |
| 534 | $obj = (($annots != '') && (!str_contains($obj, '[{annotations}]'))) ? |
| 535 | str_replace('/MediaBox', $annots . '/MediaBox', $obj) : |
| 536 | str_replace('[{annotations}]', $annots, $obj); |
| 537 | |
| 538 | $obj = (($xObjects != '') && (!str_contains($obj, '[{xobjects}]'))) ? |
| 539 | str_replace('/ProcSet', $xObjects . '/ProcSet', $obj) : |
| 540 | str_replace('[{xobjects}]', $xObjects, $obj); |
| 541 | |
| 542 | $obj = (($fonts != '') && (!str_contains($obj, '[{fonts}]'))) ? |
| 543 | str_replace('/ProcSet', $fonts . '/ProcSet', $obj) : |
| 544 | str_replace('[{fonts}]', $fonts, $obj); |
| 545 | |
| 546 | if (count($this->content) > 0) { |
| 547 | $obj = str_replace('[{content_objects}]', '/Contents[' . implode(" 0 R ", $this->content) . " 0 R]", $obj); |
| 548 | } else { |
| 549 | $obj = str_replace('[{content_objects}]', '', $obj); |
| 550 | } |
| 551 | |
| 552 | return $obj; |
| 553 | } |
| 554 | |
| 555 | } |