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<?php |
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|
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declare(strict_types=1); |
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|
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namespace AcyMailing\Libraries\Sabberworm\CSS\Property; |
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|
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class KeyframeSelector extends Selector |
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{ |
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/** |
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* This differs from the parent class: |
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* - comma is not allowed unless escaped or quoted; |
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* - percentage value is allowed by itself. |
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* |
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* @var non-empty-string |
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* |
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* @internal since 8.5.2 |
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*/ |
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public const SELECTOR_VALIDATION_RX = '/ |
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^( |
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(?: |
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# any sequence of valid unescaped characters, except quotes |
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[a-zA-Z0-9\\x{00A0}-\\x{FFFF}_^$|*=~\\[\\]()\\-\\s\\.:#+>]++ |
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| |
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# one or more escaped characters |
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(?:\\\\.)++ |
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| |
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# quoted text, like in `[id="example"]` |
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(?: |
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# opening quote |
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([\'"]) |
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(?: |
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# sequence of characters except closing quote or backslash |
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(?:(?!\\g{-1}|\\\\).)++ |
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| |
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# one or more escaped characters |
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(?:\\\\.)++ |
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)*+ # zero or more times |
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# closing quote or end (unmatched quote is currently allowed) |
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(?:\\g{-1}|$) |
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) |
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)*+ # zero or more times |
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| |
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# keyframe animation progress percentage (e.g. 50%), untrimmed |
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\\s*+(\\d++%)\\s*+ |
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)$ |
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/ux'; |
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} |
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|
