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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Css\Value; |
| 6 | |
| 7 | /** |
| 8 | * CSS Generated Content for Paged Media 3 §5.2 — `string(<name> |
| 9 | * [, <fetch-target>]?)`. Returns the current value of a named |
| 10 | * string defined via `string-set`. The fetch-target keyword |
| 11 | * selects which page's value to use: |
| 12 | * |
| 13 | * - `first` — first assignment on the page (default). |
| 14 | * - `start` — value at page start (i.e. last assignment from |
| 15 | * an earlier page, or null when nothing yet). |
| 16 | * - `last` — last assignment on the page. |
| 17 | * - `first-except` — same as `first` but null if the entry |
| 18 | * element starts on this page. |
| 19 | * |
| 20 | * The renderer resolves the value at paint time once the |
| 21 | * page-by-page string store is built up from cascade |
| 22 | * `string-set` assignments. |
| 23 | */ |
| 24 | final readonly class StringFunction extends Value |
| 25 | { |
| 26 | public function __construct( |
| 27 | public string $name, |
| 28 | public string $target = 'first', |
| 29 | ) {} |
| 30 | |
| 31 | public function toCss(): string |
| 32 | { |
| 33 | return $this->target === 'first' |
| 34 | ? sprintf('string(%s)', $this->name) |
| 35 | : sprintf('string(%s, %s)', $this->name, $this->target); |
| 36 | } |
| 37 | } |