[gravitypdf-bot]

A selector with two levels of nested parentheses threw from the scanner:

qp($xml)->find('li:not(:not(:nth-child(1)))');
// before: QueryPath\Exception: Recursion error detected at iteration 29.
// after:  the first <li> of each list

Cause

Scanner::getPseudoClassString() reads a nested (...) with a recursive call, and that call already consumes the closing ). The outer loop then called nextToken() again and skipped one more character. With one level of nesting, the skipped character was the outer ). That only went unnoticed when the selector ended there: li:not(:nth-child(1)) b parsed as li:not(":nth-child(1) b"). With two levels, the outer argument never saw its ) and the scanner read past the end. find() and remove() share this scanner, so both engines threw.

Change

• Skip the extra nextToken() after a nested argument.
• Read quoted strings inside a parenthesised argument whole too, so :contains("a)b") no longer ends at the quoted paren, and :contains("a(b)") keeps its closing quote.

The change is confined to src/CSS/Scanner.php. The parser and both engines are untouched.

Tests

• ParserTest: the value passed to pseudoClass() for every selector in the issue's table, plus three levels of nesting, quoted and unquoted arguments containing parens, and a selector that continues after a nested argument (li:not(:nth-child(1)) b).
• DOMQueryTest: find() and remove() results for the same selectors.
  • :has() is checked only through the parser and remove(), because find() never matches :has() (:has() never matches in find(): qp($xml)->find('ul:has(li)') returns nothing #121).
  • :matches() and :eq() are checked only through find(). The legacy engine doesn't support :matches(), and it evaluates :eq() inside :not() per element: remove('li:not(:eq(0))') already removes nothing on main.

24 of the new cases fail on main.

Behaviour change

Selectors that continue after a nested argument (li:not(:nth-child(1)) b, p:not(:has(a)).x) now apply the trailing part as a separate selector step. Before, it was folded into the pseudo-class argument.

Fixes #120.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.98%. Comparing base (6ae6acf) to head (62f647d).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #122      +/-   ##
============================================
+ Coverage     90.69%   90.98%   +0.28%     
- Complexity     1424     1429       +5     
============================================
  Files            25       25              
  Lines          3170     3171       +1     
============================================
+ Hits           2875     2885      +10     
+ Misses          295      286       -9     

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