XPath

# File lib/xpath.rb, line 10
def self.generate
  yield(Expression::Self.new)
end

# File lib/xpath.rb, line 30
def anywhere(expression)
  Expression::Anywhere.new(expression)
end

# File lib/xpath.rb, line 34
def attr(expression)
  Expression::Attribute.new(current, expression)
end

# File lib/xpath.rb, line 26
def child(*expressions)
  Expression::Child.new(current, expressions)
end

# File lib/xpath.rb, line 38
def contains(expression)
  Expression::Contains.new(current, expression)
end

# File lib/xpath.rb, line 58
def css(selector)
  paths = Nokogiri::CSS.xpath_for(selector).map do |selector|
    Expression::CSS.new(current, Expression::Literal.new(selector))
  end
  Union.new(*paths)
end

# File lib/xpath.rb, line 14
def current
  Expression::Self.new
end

# File lib/xpath.rb, line 22
def descendant(*expressions)
  Expression::Descendant.new(current, expressions)
end

# File lib/xpath.rb, line 18
def name
  Expression::Name.new(current)
end

# File lib/xpath.rb, line 50
def string
  Expression::StringFunction.new(current)
end

# File lib/xpath.rb, line 54
def tag(name)
  Expression::Tag.new(name)
end

# File lib/xpath.rb, line 42
def text
  Expression::Text.new(current)
end

# File lib/xpath.rb, line 46
def var(name)
  Expression::Variable.new(name)
end

# File lib/xpath.rb, line 65
def varstring(name)
  var(name).string_literal
end