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##
# Extracts sections of text enclosed in plus, tt or code. Used to discover
# undocumented parameters.
class RDoc::Markup::ToTtOnly < RDoc::Markup::Formatter
##
# Stack of list types
attr_reader :list_type
##
# Output accumulator
attr_reader :res
##
# Creates a new tt-only formatter.
def initialize markup = nil
super nil, markup
add_tag :TT, nil, nil
end
##
# Adds tts from +block_quote+ to the output
def accept_block_quote block_quote
tt_sections block_quote.text
end
##
# Pops the list type for +list+ from #list_type
def accept_list_end list
@list_type.pop
end
##
# Pushes the list type for +list+ onto #list_type
def accept_list_start list
@list_type << list.type
end
##
# Prepares the visitor for consuming +list_item+
def accept_list_item_start list_item
case @list_type.last
when :NOTE, :LABEL then
Array(list_item.label).map do |label|
tt_sections label
end.flatten
end
end
##
# Adds +paragraph+ to the output
def accept_paragraph paragraph
tt_sections(paragraph.text)
end
##
# Does nothing to +markup_item+ because it doesn't have any user-built
# content
def do_nothing markup_item
end
alias accept_blank_line do_nothing # :nodoc:
alias accept_heading do_nothing # :nodoc:
alias accept_list_item_end do_nothing # :nodoc:
alias accept_raw do_nothing # :nodoc:
alias accept_rule do_nothing # :nodoc:
alias accept_verbatim do_nothing # :nodoc:
##
# Extracts tt sections from +text+
def tt_sections text
flow = @am.flow text.dup
flow.each do |item|
case item
when String then
@res << item if in_tt?
when RDoc::Markup::AttrChanger then
off_tags res, item
on_tags res, item
when RDoc::Markup::Special then
@res << convert_special(item) if in_tt? # TODO can this happen?
else
raise "Unknown flow element: #{item.inspect}"
end
end
res
end
##
# Returns an Array of items that were wrapped in plus, tt or code.
def end_accepting
@res.compact
end
##
# Prepares the visitor for gathering tt sections
def start_accepting
@res = []
@list_type = []
end
end
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