Module io.sf.carte.css4j
Package io.sf.carte.doc.style.css

Interface SelectorMatcher

All Known Implementing Classes:
AbstractSelectorMatcher, BaseSelectorMatcher, DOMSelectorMatcher
public interface SelectorMatcher
CSS Selector matcher.

The classes implementing this interface contain the logic for elements to match selectors.

Early versions of this library were designed to provide computed styles for both DOM and non-DOM implementations. The idea is that if an object implementing a SelectorMatcher can be built, the infrastructure to compute styles could be directly used. With today's library, providing computed styles for a DOM-like document that does not implement DOM would not be that straightforward, but should still be possible.

This interface is a remnant of the early design where the SelectorMatcher was the pivot for all the computed style infrastructure, providing universal support for any document backend; it also packs two matches methods inside it. Modern DOM versions (and subsequently also this library's CSSElement) directly have matches methods, which makes the CSSElement.getSelectorMatcher() method a bit superfluous, although it is being kept for now.

  • Method Summary

    Modifier and Type
    Method
    Description
    Condition
    getPseudoElement()
    Get the pseudo-element that this matcher will use to match selectors.
    boolean
    matches(Selector selector)
    Does this object match the given selector?
    int
    matches(SelectorList selist)
    Does this object match the given selector list?
    boolean
    matchesRelational(Selector selector)
    Does this object match the given selector inside a has() pseudo-class?
    void
    setPseudoElement(Condition pseudoElt)
    Set this selector's pseudo-element.

  • Method Details

    • getPseudoElement

      Condition getPseudoElement()
      Get the pseudo-element that this matcher will use to match selectors.
      Returns:
      the pseudo-element condition, or null if no pseudo-element will be used to match selectors.

    • setPseudoElement

      void setPseudoElement(Condition pseudoElt)
      Set this selector's pseudo-element.
      Parameters:
      pseudoElt - the pseudo-element condition, or null if none.

    • matches

      int matches(SelectorList selist)
      Does this object match the given selector list?
      Parameters:
      selist - the list of selectors to which this matcher will compare.
      Returns:
      the index of the highest matching selector, or -1 if none matches.

    • matches

      boolean matches(Selector selector)
      Does this object match the given selector?
      Parameters:
      selector - the selector to be tested.
      Returns:
      true if this matcher matches this object, false otherwise.

    • matchesRelational

      boolean matchesRelational(Selector selector)
      Does this object match the given selector inside a has() pseudo-class?
      Parameters:
      selector - the selector to be tested.
      Returns:
      true if this matcher relationally matches this object, false otherwise.