class Cucumber::Tree::BaseStep

def self.new_id!
  @next_id ||= -1
  @next_id += 1
end

def actual_keyword
  keyword == Cucumber.language['and'] ? previous_step.actual_keyword : keyword
end

def execute_in(world, regexp, args, proc)
  strip_pos = nil
  begin
    proc.call_in(world, *args)
  rescue ArityMismatchError => e
    e.backtrace[0] = proc.to_backtrace_line
    strip_pos = e.backtrace.index("#{__FILE__}:#{__LINE__ - 3}:in `execute_in'")
    format_error(strip_pos, proc, e)
  rescue => e
    method_line = "#{__FILE__}:#{__LINE__ - 6}:in `execute_in'"
    method_line_pos = e.backtrace.index(method_line)
    if method_line_pos
      strip_pos = method_line_pos - (Pending === e ? PENDING_ADJUSTMENT : REGULAR_ADJUSTMENT) 
    else
      # This happens with rails, because they screw up the backtrace
      # before we get here (injecting erb stacktrace and such)
    end
    format_error(strip_pos, proc, e)
  end
end

def file
  @scenario.file
end

def format_error(strip_pos, proc, e)
  @error = e
  # Remove lines underneath the plain text step
  e.backtrace[strip_pos..-1] = nil unless strip_pos.nil?
  e.backtrace.flatten
  # Replace the step line with something more readable
  e.backtrace.replace(e.backtrace.map{|l| l.gsub(/`#{proc.meth}'/, "`#{keyword} #{proc.name}'")})
  if row?
    e.backtrace << "#{file}:#{line}:in `#{proc.name}'"
  else
    e.backtrace << "#{file}:#{line}:in `#{keyword} #{name}'"
  end
  raise e
end

def id
  @id ||= self.class.new_id!
end

def length
  keyword.jlength + 1 + name.jlength
end

def padding_length
  @scenario.step_padding_length(self)
end

def previous_step
  @scenario.previous_step(self)
end

def steps
  self
end