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require 'rd/element'
require 'rd/labeled-element'
module RD
# Block-level Element of document tree. abstruct class.
class BlockElement < Element
end
class Headline < BlockElement
include NonterminalElement
include LabeledElement
MARK2LEVEL = {
"=" => 1,
"==" => 2,
"===" => 3,
"====" => 4,
"+" => 5,
"++" => 6
}
attr_accessor :level
attr_reader :title
def initialize(level_num)
super()
@level = level_num
@title = []
end
def accept(visitor)
visitor.visit_Headline(self)
end
def calculate_label
ret = ""
@title.each do |i|
ret << i.to_label
end
ret
end
private :calculate_label
def Headline.mark_to_level(mark_str)
MARK2LEVEL[mark_str] or
raise ArgumentError, "#{mark_str} is irregular for Headline mark."
end
def children
@title
end
end
class Include < BlockElement
include TerminalElement
attr_accessor :filename
def initialize(filename)
super()
@filename = filename
end
def accept(visitor)
visitor.visit_Include(self)
end
end # Include
class TextBlock < BlockElement
include NonterminalElement
attr_accessor :content
def initialize()
super()
@content = []
end
def accept(visitor)
visitor.visit_TextBlock(self)
end
def children
@content
end
end
class Verbatim < BlockElement
include TerminalElement
attr_reader :content
def initialize(content_strings = [])
super()
@content = content_strings # Array of String
end
def accept(visitor)
visitor.visit_Verbatim(self)
end
def each_line
if @content.respond_to?(:each_line)
@content.each_line {|i|
yield i
}
else
@content.each {|i|
yield i
}
end
end
end
end
|
