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1<?php
2
3declare(strict_types=1);
4
5namespace Phpdftk\Pdf\Core\Multimedia;
6
7use Phpdftk\Pdf\Core\PdfDictionary;
8use Phpdftk\Pdf\Core\PdfName;
9use Phpdftk\Pdf\Core\PdfObject;
10use Phpdftk\Pdf\Core\PdfString;
11use Phpdftk\Pdf\Core\PdfVersion;
12use Phpdftk\Pdf\Core\RequiresPdfVersion;
13
14/**
15 * Navigator (/Type /Navigator) — ISO 32000-2 §13.2.7.
16 *
17 * Scripted presentation sequence that drives transitions between pages
18 * or slides during multimedia playback.
19 */
20#[RequiresPdfVersion(PdfVersion::V1_5)]
21class Navigator extends PdfObject
22{
23    public const PDF_TYPE = 'Navigator';
24
25    public ?PdfDictionary $na = null;   // /NA  actions map
26    public ?PdfString $nr = null;       // /NR  navigator name
27    public ?PdfDictionary $du = null;   // /Duration dict
28
29    public function toPdf(): string
30    {
31        $dict = new PdfDictionary();
32        $dict->set('Type', new PdfName(self::PDF_TYPE));
33        if ($this->na !== null) {
34            $dict->set('NA', $this->na);
35        }
36        if ($this->nr !== null) {
37            $dict->set('NR', $this->nr);
38        }
39        if ($this->du !== null) {
40            $dict->set('Duration', $this->du);
41        }
42        return $dict->toPdf();
43    }
44}