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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Css\Cascade; |
| 6 | |
| 7 | use Phpdftk\Css\Value\Value; |
| 8 | |
| 9 | /** |
| 10 | * Per-element bag of resolved property → value pairs after the cascade |
| 11 | * has been applied. Phase 1D.3 ships this as a simple map; once the full |
| 12 | * `ComputedStyle` accessor surface lands (per `contracts.md`), this becomes |
| 13 | * the underlying storage backing those getters. |
| 14 | * |
| 15 | * `get($name)` falls back to the registry's initial value when the property |
| 16 | * was never set, so callers can treat the map as if every registered |
| 17 | * property is present. |
| 18 | */ |
| 19 | final class CascadedValues |
| 20 | { |
| 21 | /** @var array<string, Value> */ |
| 22 | private array $values = []; |
| 23 | |
| 24 | /** @var array<string, Value> */ |
| 25 | private array $customProperties = []; |
| 26 | |
| 27 | /** |
| 28 | * Properties that a DECLARATION won the cascade for on this element, |
| 29 | * as opposed to arriving from inheritance or the registry's initial |
| 30 | * value. |
| 31 | * |
| 32 | * `has()` cannot answer that question for an INHERITED property — |
| 33 | * `color`, `white-space`, `border-spacing` and friends are present in |
| 34 | * every element's map no matter what the author wrote — and that is |
| 35 | * exactly what a presentational-hint mapping needs to know, since a |
| 36 | * hint must lose to any author declaration. |
| 37 | * |
| 38 | * @var array<string, true> |
| 39 | */ |
| 40 | private array $declared = []; |
| 41 | |
| 42 | public function __construct(private readonly PropertyRegistry $registry) {} |
| 43 | |
| 44 | /** Mark `$name` as supplied by a declaration (see {@see wasDeclared()}). */ |
| 45 | public function markDeclared(string $name): void |
| 46 | { |
| 47 | $this->declared[$this->normalise($name)] = true; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Did a declaration supply this property's value on this element? |
| 52 | * False for a value that came from inheritance or the initial value. |
| 53 | */ |
| 54 | public function wasDeclared(string $name): bool |
| 55 | { |
| 56 | return isset($this->declared[$this->normalise($name)]); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Did ANY declaration supply a value on this element? |
| 61 | * |
| 62 | * False for a bag built purely from inheritance + initial values. |
| 63 | * Pseudo-element box generation uses this to tell "an author styled |
| 64 | * `::first-letter`" from "nobody did, and this bag is just the host's |
| 65 | * inherited text styles" — a distinction `has()` cannot make, since |
| 66 | * every registered property answers `has()` once inheritance has run. |
| 67 | */ |
| 68 | public function hasDeclarations(): bool |
| 69 | { |
| 70 | return $this->declared !== []; |
| 71 | } |
| 72 | |
| 73 | public function set(string $name, Value $value): void |
| 74 | { |
| 75 | $key = $this->normalise($name); |
| 76 | if (str_starts_with($key, '--')) { |
| 77 | $this->customProperties[$key] = $value; |
| 78 | return; |
| 79 | } |
| 80 | $this->values[$key] = $value; |
| 81 | } |
| 82 | |
| 83 | public function has(string $name): bool |
| 84 | { |
| 85 | $key = $this->normalise($name); |
| 86 | if (str_starts_with($key, '--')) { |
| 87 | return isset($this->customProperties[$key]); |
| 88 | } |
| 89 | return isset($this->values[$key]); |
| 90 | } |
| 91 | |
| 92 | public function get(string $name): ?Value |
| 93 | { |
| 94 | $key = $this->normalise($name); |
| 95 | if (str_starts_with($key, '--')) { |
| 96 | return $this->customProperties[$key] ?? null; |
| 97 | } |
| 98 | if (isset($this->values[$key])) { |
| 99 | return $this->values[$key]; |
| 100 | } |
| 101 | return $this->registry->get($key)?->initial; |
| 102 | } |
| 103 | |
| 104 | /** @return array<string, Value> standard properties only */ |
| 105 | public function all(): array |
| 106 | { |
| 107 | return $this->values; |
| 108 | } |
| 109 | |
| 110 | /** @return array<string, Value> declared custom properties only */ |
| 111 | public function customProperties(): array |
| 112 | { |
| 113 | return $this->customProperties; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Custom-property names are case-sensitive per the spec; standard |
| 118 | * properties are lower-cased. |
| 119 | */ |
| 120 | private function normalise(string $name): string |
| 121 | { |
| 122 | return str_starts_with($name, '--') ? $name : strtolower($name); |
| 123 | } |
| 124 | } |