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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Pdf\Core; |
| 6 | |
| 7 | /** |
| 8 | * Represents a PDF literal string (text) or a hex string <hex>. |
| 9 | */ |
| 10 | class PdfString implements Serializable |
| 11 | { |
| 12 | public function __construct( |
| 13 | public readonly string $value, |
| 14 | public readonly bool $hex = false, |
| 15 | ) {} |
| 16 | |
| 17 | public function toPdf(): string |
| 18 | { |
| 19 | if ($this->hex) { |
| 20 | return '<' . bin2hex($this->value) . '>'; |
| 21 | } |
| 22 | |
| 23 | // Literal string: escape backslash, parentheses, and control chars |
| 24 | $escaped = ''; |
| 25 | $len = strlen($this->value); |
| 26 | for ($i = 0; $i < $len; $i++) { |
| 27 | $c = $this->value[$i]; |
| 28 | $escaped .= match ($c) { |
| 29 | '\\' => '\\\\', |
| 30 | '(' => '\\(', |
| 31 | ')' => '\\)', |
| 32 | "\n" => '\\n', |
| 33 | "\r" => '\\r', |
| 34 | "\t" => '\\t', |
| 35 | "\x08" => '\\b', |
| 36 | "\x0C" => '\\f', |
| 37 | default => $c, |
| 38 | }; |
| 39 | } |
| 40 | |
| 41 | return '(' . $escaped . ')'; |
| 42 | } |
| 43 | } |