Module org.jhotdraw8.css
Package org.jhotdraw8.css.ast

Class IdSelector

java.lang.Object
org.jhotdraw8.css.ast.AbstractSyntaxTree
org.jhotdraw8.css.ast.Selector
org.jhotdraw8.css.ast.SimpleSelector
org.jhotdraw8.css.ast.IdSelector
public class IdSelector extends SimpleSelector
An "id selector" matches an element if the element has an id with the specified value.
Author:
Werner Randelshofer

  • Constructor Details

  • Method Details

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • match

      public <T> @Nullable T match(SelectorModel<T> model, @Nullable T element)
      Description copied from class: Selector
      Returns the matching element.
      Specified by:
      match in class Selector
      Type Parameters:
      T - element type
      Parameters:
      model - The helper is used to access properties of the element and parent or sibling elements in the document.
      element - the element
      Returns:
      the matching element or null

    • getSpecificity

      public int getSpecificity()
      Description copied from class: Selector
      Returns the specificity of this selector.

      A selector's specificity is calculated as follows:

      • count the number of ID selectors in the selector (= a)
      • count the number of class selectors, attributes selectors, and pseudo-classes in the selector (= b)
      • count the number of type selectors and pseudo-elements in the selector (= c)
      • ignore the universal selector

      Selectors inside the negation pseudo-class are counted like any other, but the negation itself does not count as a pseudo-class.

      Concatenating the three numbers a-b-c (in a number system with a large base) gives the specificity.

      In this implementation we compute specificity with specificity=100*a+10*b+c.

      References:

      CSS Syntax Selectors Level 3, Chapter 9. Calculating a selector's specificity
      w3.org
      Specified by:
      getSpecificity in class Selector
      Returns:
      the specificity

    • produceTokens

      public void produceTokens(Consumer<CssToken> consumer)
      Description copied from class: AbstractSyntaxTree
      Produces tokens for the subtree starting at this tree node.
      Overrides:
      produceTokens in class AbstractSyntaxTree
      Parameters:
      consumer - a consumer for the tokens

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object