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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Pdf\Core\Document; |
| 6 | |
| 7 | use Phpdftk\Pdf\Core\PdfArray; |
| 8 | use Phpdftk\Pdf\Core\PdfDictionary; |
| 9 | use Phpdftk\Pdf\Core\PdfName; |
| 10 | use Phpdftk\Pdf\Core\PdfObject; |
| 11 | use Phpdftk\Pdf\Core\PdfReference; |
| 12 | use Phpdftk\Pdf\Core\PdfVersion; |
| 13 | use Phpdftk\Pdf\Core\RequiresPdfVersion; |
| 14 | |
| 15 | /** |
| 16 | * Document part node (/Type /DPart) — ISO 32000-2 §14.12. |
| 17 | * |
| 18 | * A node in the document-part tree. Internal nodes carry a /DParts |
| 19 | * array of child node references; leaves carry a /Start page reference |
| 20 | * (and optionally /End) plus their record metadata. |
| 21 | */ |
| 22 | #[RequiresPdfVersion(PdfVersion::V2_0)] |
| 23 | class DPart extends PdfObject |
| 24 | { |
| 25 | public const PDF_TYPE = 'DPart'; |
| 26 | |
| 27 | public PdfReference $parent; // /Parent - required |
| 28 | public ?PdfArray $dParts = null; // /DParts - child nodes |
| 29 | public ?PdfReference $start = null; // /Start |
| 30 | public ?PdfReference $end = null; // /End |
| 31 | public ?PdfDictionary $dpm = null; // /DPM - document-part metadata |
| 32 | |
| 33 | public function __construct(PdfReference $parent) |
| 34 | { |
| 35 | $this->parent = $parent; |
| 36 | } |
| 37 | |
| 38 | public function toPdf(): string |
| 39 | { |
| 40 | $dict = new PdfDictionary(); |
| 41 | $dict->set('Type', new PdfName(self::PDF_TYPE)); |
| 42 | $dict->set('Parent', $this->parent); |
| 43 | if ($this->dParts !== null) { |
| 44 | $dict->set('DParts', $this->dParts); |
| 45 | } |
| 46 | if ($this->start !== null) { |
| 47 | $dict->set('Start', $this->start); |
| 48 | } |
| 49 | if ($this->end !== null) { |
| 50 | $dict->set('End', $this->end); |
| 51 | } |
| 52 | if ($this->dpm !== null) { |
| 53 | $dict->set('DPM', $this->dpm); |
| 54 | } |
| 55 | return $dict->toPdf(); |
| 56 | } |
| 57 | } |