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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\HtmlToPdf\Box; |
| 6 | |
| 7 | use Phpdftk\Css\Cascade\CascadedValues; |
| 8 | use Phpdftk\Html\Dom\Element; |
| 9 | use Phpdftk\HtmlToPdf\Layout\BoxGeometry; |
| 10 | use Phpdftk\HtmlToPdf\Layout\LineBox; |
| 11 | use Phpdftk\HtmlToPdf\Layout\MultiColumnLayout; |
| 12 | |
| 13 | /** |
| 14 | * Base of the box tree produced by {@see BoxGenerator}. |
| 15 | * |
| 16 | * Each non-anonymous box carries its originating DOM element + the |
| 17 | * cascade's resolved property bag for that element. Anonymous boxes |
| 18 | * (wrappers synthesised by CSS Display 3 box-generation rules) have a |
| 19 | * null `$element` but inherit a style derived from their parent. |
| 20 | * |
| 21 | * `$children` is in document / logical order; layout (Phase 1F) walks the |
| 22 | * tree to compute positions and dimensions without re-ordering. |
| 23 | * |
| 24 | * Phase 1E.1 ships the structural box tree only — every box's geometry |
| 25 | * (`x`, `y`, `width`, `height`) is layout's responsibility, not box |
| 26 | * generation's. Keep that boundary sharp; this class doesn't track |
| 27 | * positions or sizes. |
| 28 | */ |
| 29 | abstract class Box |
| 30 | { |
| 31 | /** @var list<Box> */ |
| 32 | public array $children = []; |
| 33 | |
| 34 | /** Resolved geometry — populated by layout, blank until {@see \Phpdftk\HtmlToPdf\Layout\BlockLayout} runs. */ |
| 35 | public BoxGeometry $geometry; |
| 36 | |
| 37 | /** |
| 38 | * Line boxes produced by {@see \Phpdftk\HtmlToPdf\Layout\InlineLayout} |
| 39 | * when this box's children form an inline formatting context. Empty |
| 40 | * for block-context parents and for boxes without inline content. |
| 41 | * |
| 42 | * @var list<LineBox> |
| 43 | */ |
| 44 | public array $lineBoxes = []; |
| 45 | |
| 46 | /** |
| 47 | * Set by {@see \Phpdftk\HtmlToPdf\Layout\BlockLayout} when this box's |
| 48 | * cascade declares a multi-column container (CSS Multi-column 1). |
| 49 | * Null on every other box. The painter reads this to stroke |
| 50 | * `column-rule` between adjacent columns. |
| 51 | */ |
| 52 | public ?MultiColumnLayout $multiColumn = null; |
| 53 | |
| 54 | public function __construct( |
| 55 | public readonly ?Element $element, |
| 56 | public readonly CascadedValues $style, |
| 57 | ) { |
| 58 | $this->geometry = new BoxGeometry(); |
| 59 | } |
| 60 | |
| 61 | public function addChild(self $child): void |
| 62 | { |
| 63 | $this->children[] = $child; |
| 64 | } |
| 65 | } |