Class: Hexp::CssSelector::Sequence

Inherits:
Object
  • Object
show all
Includes:
Members
Defined in:
lib/hexp/css_selector.rb

Overview

A single CSS sequence like ‘div span .foo’

Instance Attribute Summary

Attributes included from Members

#members

Instance Method Summary collapse

Methods included from Members

included, #initialize, #inspect

Instance Method Details

#drop_head ⇒ Hexp::CssSelector::Sequence

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Drop the first element of this Sequence

This returns a new Sequence, with one member less.

Returns:



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# File 'lib/hexp/css_selector.rb', line 161

def drop_head
  self.class.new(members.drop(1))
end

#head_matches?(element) ⇒ true, false

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Does the first element of this sequence match the element

Parameters:

Returns:

  • (true, false) 


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# File 'lib/hexp/css_selector.rb', line 132

def head_matches?(element)
  members.first.matches?(element)
end

#matches_path?(path) ⇒ Boolean

Warning: Highly optimized cryptic code

Returns:

  • (Boolean) 


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# File 'lib/hexp/css_selector.rb', line 137

def matches_path?(path)
  return false if path.length < members.length
  return false unless members.last.matches?(path.last)

  path_idx = path.length    - 2
  mem_idx  = members.length - 2

  until path_idx < mem_idx || mem_idx == -1
    if members[mem_idx].matches?(path[path_idx])
      mem_idx -= 1
    end
    path_idx -= 1
  end

  mem_idx == -1
end