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require 'rdoc/markup/fragments'
require 'rdoc/markup/inline'
require 'cgi'
class RDoc::Markup
module Flow
P = Struct.new(:body)
VERB = Struct.new(:body)
RULE = Struct.new(:width)
class LIST
attr_reader :type, :contents
def initialize(type)
@type = type
@contents = []
end
def <<(stuff)
@contents << stuff
end
end
LI = Struct.new(:label, :body)
H = Struct.new(:level, :text)
end
class ToFlow
LIST_TYPE_TO_HTML = {
:BULLET => [ "<ul>", "</ul>" ],
:NUMBER => [ "<ol>", "</ol>" ],
:UPPERALPHA => [ "<ol>", "</ol>" ],
:LOWERALPHA => [ "<ol>", "</ol>" ],
:LABELED => [ "<dl>", "</dl>" ],
:NOTE => [ "<table>", "</table>" ],
}
InlineTag = Struct.new(:bit, :on, :off)
def initialize
init_tags
end
##
# Set up the standard mapping of attributes to HTML tags
def init_tags
@attr_tags = [
InlineTag.new(RDoc::Markup::Attribute.bitmap_for(:BOLD), "<b>", "</b>"),
InlineTag.new(RDoc::Markup::Attribute.bitmap_for(:TT), "<tt>", "</tt>"),
InlineTag.new(RDoc::Markup::Attribute.bitmap_for(:EM), "<em>", "</em>"),
]
end
##
# Add a new set of HTML tags for an attribute. We allow separate start and
# end tags for flexibility
def add_tag(name, start, stop)
@attr_tags << InlineTag.new(RDoc::Markup::Attribute.bitmap_for(name), start, stop)
end
##
# Given an HTML tag, decorate it with class information and the like if
# required. This is a no-op in the base class, but is overridden in HTML
# output classes that implement style sheets
def annotate(tag)
tag
end
##
# Here's the client side of the visitor pattern
def start_accepting
@res = []
@list_stack = []
end
def end_accepting
@res
end
def accept_paragraph(am, fragment)
@res << Flow::P.new((convert_flow(am.flow(fragment.txt))))
end
def accept_verbatim(am, fragment)
@res << Flow::VERB.new((convert_flow(am.flow(fragment.txt))))
end
def accept_rule(am, fragment)
size = fragment.param
size = 10 if size > 10
@res << Flow::RULE.new(size)
end
def accept_list_start(am, fragment)
@list_stack.push(@res)
list = Flow::LIST.new(fragment.type)
@res << list
@res = list
end
def accept_list_end(am, fragment)
@res = @list_stack.pop
end
def accept_list_item(am, fragment)
@res << Flow::LI.new(fragment.param, convert_flow(am.flow(fragment.txt)))
end
def accept_blank_line(am, fragment)
# @res << annotate("<p />") << "\n"
end
def accept_heading(am, fragment)
@res << Flow::H.new(fragment.head_level, convert_flow(am.flow(fragment.txt)))
end
private
def on_tags(res, item)
attr_mask = item.turn_on
return if attr_mask.zero?
@attr_tags.each do |tag|
if attr_mask & tag.bit != 0
res << annotate(tag.on)
end
end
end
def off_tags(res, item)
attr_mask = item.turn_off
return if attr_mask.zero?
@attr_tags.reverse_each do |tag|
if attr_mask & tag.bit != 0
res << annotate(tag.off)
end
end
end
def convert_flow(flow)
res = ""
flow.each do |item|
case item
when String
res << convert_string(item)
when AttrChanger
off_tags(res, item)
on_tags(res, item)
when Special
res << convert_special(item)
else
raise "Unknown flow element: #{item.inspect}"
end
end
res
end
def convert_string(item)
CGI.escapeHTML(item)
end
def convert_special(special)
handled = false
Attribute.each_name_of(special.type) do |name|
method_name = "handle_special_#{name}"
if self.respond_to? method_name
special.text = send(method_name, special)
handled = true
end
end
raise "Unhandled special: #{special}" unless handled
special.text
end
end
end
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