class RhetButler::SlideTraverser

Attributes

iter_stack[R]
target_stack[R]

Public Class Methods

new() click to toggle source
# File lib/rhet-butler/slide-traverser.rb, line 5
def initialize
  @iter_stack = []
  @target_stack = []
end

Public Instance Methods

ascend() click to toggle source
# File lib/rhet-butler/slide-traverser.rb, line 16
def ascend
  target_stack.pop
  iter_stack.pop
end
descend(source, dest) click to toggle source
# File lib/rhet-butler/slide-traverser.rb, line 21
def descend(source, dest)
  iter_stack.push source.each
  target_stack.push dest
end
on_group(group) click to toggle source
# File lib/rhet-butler/slide-traverser.rb, line 12
def on_group(group)
  descend(group, group)
end
traverse() click to toggle source
# File lib/rhet-butler/slide-traverser.rb, line 26
def traverse
  setup
  until iter_stack.empty?
    begin
      item = iter_stack.last.next
      case item
      when Slide
        on_slide(item)
      when Includer
        on_include(item)
      else
        on_group(item)
      end
    rescue StopIteration
      ascend
    end
  end
end