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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Css\Selector; |
| 6 | |
| 7 | /** |
| 8 | * Attribute selector per Selectors 4 §6.5: `[name op value flag]`. |
| 9 | * |
| 10 | * Specificity (0, 1, 0). The optional flag is tri-state: |
| 11 | * |
| 12 | * - `i` → `caseInsensitive = true` — force ASCII-case-insensitive. |
| 13 | * - `s` → `caseInsensitive = false` — force case-sensitive. |
| 14 | * - no flag → `caseInsensitive = null` — defer to host language |
| 15 | * defaults (HTML lists certain attribute names as case- |
| 16 | * insensitive per §6.6). |
| 17 | */ |
| 18 | final readonly class AttributeSelector extends SimpleSelector |
| 19 | { |
| 20 | public function __construct( |
| 21 | public string $name, |
| 22 | public AttributeMatchType $matchType = AttributeMatchType::Exists, |
| 23 | public ?string $value = null, |
| 24 | public ?string $namespacePrefix = null, |
| 25 | public ?bool $caseInsensitive = null, |
| 26 | ) {} |
| 27 | |
| 28 | public function specificity(): Specificity |
| 29 | { |
| 30 | return new Specificity(0, 1, 0); |
| 31 | } |
| 32 | |
| 33 | public function toString(): string |
| 34 | { |
| 35 | $name = $this->namespacePrefix !== null |
| 36 | ? $this->namespacePrefix . '|' . $this->name |
| 37 | : $this->name; |
| 38 | if ($this->matchType === AttributeMatchType::Exists) { |
| 39 | return '[' . $name . ']'; |
| 40 | } |
| 41 | $value = $this->value ?? ''; |
| 42 | $needsQuoting = preg_match('/[^A-Za-z0-9_-]/', $value) === 1 || $value === ''; |
| 43 | $quoted = $needsQuoting ? '"' . str_replace('"', '\\"', $value) . '"' : $value; |
| 44 | $flag = match ($this->caseInsensitive) { |
| 45 | true => ' i', |
| 46 | false => ' s', |
| 47 | null => '', |
| 48 | }; |
| 49 | return '[' . $name . $this->matchType->value . $quoted . $flag . ']'; |
| 50 | } |
| 51 | } |