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require 'rdoc/markup/inline'
##
# Outputs RDoc markup as RDoc markup! (mostly)
class RDoc::Markup::ToRdoc < RDoc::Markup::Formatter
attr_accessor :indent
attr_reader :list_index
attr_reader :list_type
attr_reader :list_width
attr_reader :prefix
attr_reader :res
def initialize
super
@markup.add_special(/\\[^\s]/, :SUPPRESSED_CROSSREF)
@width = 78
@prefix = ''
init_tags
@headings = {}
@headings.default = []
@headings[1] = ['= ', '']
@headings[2] = ['== ', '']
@headings[3] = ['=== ', '']
@headings[4] = ['==== ', '']
@headings[5] = ['===== ', '']
@headings[6] = ['====== ', '']
end
##
# Maps attributes to ANSI sequences
def init_tags
add_tag :BOLD, "<b>", "</b>"
add_tag :TT, "<tt>", "</tt>"
add_tag :EM, "<em>", "</em>"
end
def accept_blank_line blank_line
@res << "\n"
end
def accept_heading heading
use_prefix or @res << ' ' * @indent
@res << @headings[heading.level][0]
@res << attributes(heading.text)
@res << @headings[heading.level][1]
@res << "\n"
end
def accept_list_end list
@list_index.pop
@list_type.pop
@list_width.pop
end
def accept_list_item_end list_item
width = case @list_type.last
when :BULLET then
2
when :NOTE, :LABEL then
@res << "\n"
2
else
bullet = @list_index.last.to_s
@list_index[-1] = @list_index.last.succ
bullet.length + 2
end
@indent -= width
end
def accept_list_item_start list_item
bullet = case @list_type.last
when :BULLET then
'*'
when :NOTE, :LABEL then
attributes(list_item.label) + ":\n"
else
@list_index.last.to_s + '.'
end
case @list_type.last
when :NOTE, :LABEL then
@indent += 2
@prefix = bullet + (' ' * @indent)
else
@prefix = (' ' * @indent) + bullet.ljust(bullet.length + 1)
width = bullet.length + 1
@indent += width
end
end
def accept_list_start list
case list.type
when :BULLET then
@list_index << nil
@list_width << 1
when :LABEL, :NOTE then
@list_index << nil
@list_width << 2
when :LALPHA then
@list_index << 'a'
@list_width << list.items.length.to_s.length
when :NUMBER then
@list_index << 1
@list_width << list.items.length.to_s.length
when :UALPHA then
@list_index << 'A'
@list_width << list.items.length.to_s.length
else
raise RDoc::Error, "invalid list type #{list.type}"
end
@list_type << list.type
end
def accept_paragraph paragraph
wrap attributes(paragraph.text)
end
def accept_rule rule
use_prefix or @res << ' ' * @indent
@res << '-' * (@width - @indent)
@res << "\n"
end
##
# Outputs +verbatim+ flush left and indented 2 columns
def accept_verbatim verbatim
indent = ' ' * (@indent + 2)
lines = []
current_line = []
# split into lines
verbatim.parts.each do |part|
current_line << part
if part == "\n" then
lines << current_line
current_line = []
end
end
lines << current_line unless current_line.empty?
# calculate margin
indented = lines.select { |line| line != ["\n"] }
margin = indented.map { |line| line.first.length }.min
# flush left
indented.each { |line| line[0][0...margin] = '' }
# output
use_prefix or @res << indent # verbatim is unlikely to have prefix
@res << lines.shift.join
lines.each do |line|
@res << indent unless line == ["\n"]
@res << line.join
end
@res << "\n"
end
def attributes text
flow = @am.flow text.dup
convert_flow flow
end
def end_accepting
@res.join
end
def handle_special_SUPPRESSED_CROSSREF special
special.text.sub(/\\/, '')
end
def start_accepting
@res = [""]
@indent = 0
@prefix = nil
@list_index = []
@list_type = []
@list_width = []
end
def use_prefix
prefix = @prefix
@prefix = nil
@res << prefix if prefix
prefix
end
def wrap text
return unless text && !text.empty?
text_len = @width - @indent
text_len = 20 if text_len < 20
re = /^(.{0,#{text_len}})[ \n]/
next_prefix = ' ' * @indent
prefix = @prefix || next_prefix
@prefix = nil
@res << prefix
while text.length > text_len
if text =~ re then
@res << $1
text.slice!(0, $&.length)
else
@res << text.slice!(0, text_len)
end
@res << "\n" << next_prefix
end
if text.empty? then
@res.pop
@res.pop
else
@res << text
@res << "\n"
end
end
end
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