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#!/usr/bin/ruby
# This file is part of html2trac.
# Copyright (C) 2008-2009 Dennis Schridde
#
# html2trac is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# html2trac is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with html2trac. If not, see <http://www.gnu.org/licenses/>.
require 'rexml/document'
module REXML
# Trac Wiki formatter
# Transforms XHTML 1.1 into Trac Wiki syntax
#
# This worked for Warzone 2100's ScriptingManual and likely has to be adapted to suit more generic needs.
# Do no forget to look at write_element()'s "skip" variable when adjusting it to your documents.
class Formatters::Trac < Formatters::Default
def initialize()
super()
@listtype = []
@listdepth = 0
@idmap = {}
end
def write( node, output )
case node
when Document
if node.xml_decl.encoding != "UTF-8" && !output.kind_of?(Output)
output = Output.new( output, node.xml_decl.encoding )
end
write_document( node, output )
when Element
write_element( node, output )
when Declaration, ElementDecl, NotationDecl, ExternalEntity, Entity,
Attribute, AttlistDecl
# Ignore
when Instruction
write_instruction( node, output )
when DocType, XMLDecl
# Ignore
when Comment
write_comment( node, output )
when CData
write_cdata( node, output )
when Text
write_text( node, output )
else
raise Exception.new("XML FORMATTING ERROR")
end
end
def write_cdata(node, output)
fail
end
def write_comment(node, output)
output << "\n{{{\n"
output << "#!\n"
output << node.to_s
output << "\n}}}\n"
end
def build_string(node)
result = ""
case node
when Text: result << node.to_s
when Element: node.children.each { |child| result << build_string(child) }
end
result
end
def write_document( node, output )
node.elements.each("//*[@id]") { |id| @idmap[id.attributes["id"]] = build_string(id).delete("(){}[]/+ ") }
node.children.each { |child| write( child, output ) }
end
def write_element(node, output)
begin_tag = ""
end_tag = ""
skip = nil # Set this for nodes you want to skip in your file
case node.name
when "html":
when "head": skip = true
when "body":
when "div": skip = node.elements["p/a[@href='top']"]
when "span":
when "pre": begin_tag = "\n{{{\n#!c\n" ; end_tag = "\n}}}\n"
when "table": begin_tag = "\n"
when "tr": begin_tag = "|" ; end_tag = "|\n"
when "td": begin_tag = "|" ; end_tag = "|"
when "th": begin_tag = "|'''" ; end_tag = "'''|"
when "p": begin_tag = "\n" ; end_tag = "\n"
when "h1": begin_tag = "\n= " ; end_tag = " =\n"
when "h2": begin_tag = "\n== " ; end_tag = " ==\n"
when "h3": begin_tag = "\n=== " ; end_tag = " ===\n"
when "h4": begin_tag = "\n==== " ; end_tag = " ====\n"
when "h5": begin_tag = "\n===== " ; end_tag = " =====\n"
when "b": begin_tag = "'''" ; end_tag = "'''"
when "i": begin_tag = "''" ; end_tag = "''"
when "u": begin_tag = "__" ; end_tag = "__"
when "br": begin_tag = "[[BR]]\n"
when "hr": begin_tag = "\n----\n"
when "dl": begin_tag = "\n"
when "dt": begin_tag = " " ; end_tag = "::\n"
when "dd": begin_tag = " " ; end_tag = "\n" if node.next_element
when "ol":
if node.elements["ancestor::table"]: # Trac does not support lists/linebreaks inside tables!
begin_tag = "[[BR]]"
else
begin_tag = "\n"
end
@listtype.push "ol"
@listdepth += 1
when "ul":
if node.elements["ancestor::table"]: # Trac does not support lists/linebreaks inside tables!
begin_tag = "[[BR]]"
else
begin_tag = "\n"
end
@listtype.push "ul"
@listdepth += 1
when "li":
case @listtype.last
when "ol":
if (@listdepth % 2) == 0: begin_tag = " " * @listdepth + "1. "
else begin_tag = " " * @listdepth + "a. "
end
when "ul": begin_tag = " " * @listdepth + "* "
end
if node.elements["ancestor::table"]: # Trac does not support lists/linebreaks inside tables!
end_tag = "[[BR]]"
elsif node.next_element:
end_tag = "\n"
end
when "a":
href = node.attributes["href"]
if href == "#top": skip = true end
if href[0,1] == "#":
id = href[1..-1]
begin_tag = "[#" + @idmap[id] + " "
else
begin_tag = "[" + href + " "
end
end_tag = "]"
when "acronym": begin_tag = "''" ; end_tag = "''" # Use italic style
when "code": begin_tag = "`" ; end_tag = "`"
else raise Exception.new("XHTML FORMATTING ERROR: Unexpected tag: " + node.name)
end
if node.children.empty?
output << begin_tag
else
output << begin_tag
node.children.each { |child|
write( child, output )
}
output << end_tag
end unless skip
case node.name
when "ol": @listtype.pop ; @listdepth -= 1
when "ul": @listtype.pop ; @listdepth -= 1
end
end
def write_instruction(node, output)
fail
end
def write_text( node, output )
text = node.to_s
if ["table", "tr", "dl", "ol", "ul"].include?(node.parent.name):
text.gsub!(/[[:space:]]+/, '')
elsif node.parent.name != "pre"
text.gsub!(/[[:space:]]+/, ' ')
end
output << Text::unnormalize(text)
end
end
end
xml = REXML::Document.new( STDIN )
REXML::Formatters::Trac.new.write(xml, STDOUT)
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