instiki/lib/maruku/output/to_markdown.rb

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2007-01-22 15:36:51 +01:00
#--
# Copyright (C) 2006 Andrea Censi <andrea (at) rubyforge.org>
#
# This file is part of Maruku.
#
# Maruku 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 2 of the License, or
# (at your option) any later version.
#
# Maruku 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 Maruku; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#++
class String
# XXX: markdown escaping
def to_md(c=nil)
to_s
end
# " andrea censi " => [" andrea ", "censi "]
def mysplit
split.map{|x| x+" "}
end
end
module MaRuKu; module Out; module Markdown
DefaultLineLength = 40
def to_md(context={})
children_to_md(context)
end
def to_md_paragraph(context)
line_length = context[:line_length] || DefaultLineLength
wrap(@children, line_length, context)+"\n"
end
def to_md_li_span(context)
len = (context[:line_length] || DefaultLineLength) - 2
s = add_tabs(wrap(@children, len-2, context), 1, ' ')
s[0] = ?*
s + "\n"
end
def to_md_abbr_def(context)
"*[#{self.abbr}]: #{self.text}\n"
end
def to_md_ol(context)
len = (context[:line_length] || DefaultLineLength) - 2
md = ""
self.children.each_with_index do |li, i|
s = add_tabs(w=wrap(li.children, len-2, context), 1, ' ')+"\n"
s[0,4] = "#{i+1}. "[0,4]
# puts w.inspect
md += s
end
md + "\n"
end
def to_md_ul(context)
len = (context[:line_length] || DefaultLineLength) - 2
md = ""
self.children.each_with_index do |li, i|
w = wrap(li.children, len-2, context)
# puts "W: "+ w.inspect
s = add_indent(w)
# puts "S: " +s.inspect
s[0,1] = "-"
md += s
end
md + "\n"
end
def add_indent(s,char=" ")
t = s.split("\n").map{|x| char+x }.join("\n")
s << ?\n if t[-1] == ?\n
s
end
# Convert each child to html
def children_to_md(context)
array_to_md(@children, context)
end
def wrap(array, line_length, context)
out = ""
line = ""
array.each do |c|
if c.kind_of?(MDElement) && c.node_type == :linebreak
out << line.strip << " \n"; line="";
next
end
pieces =
if c.kind_of? String
c.to_md.mysplit
else
[c.to_md(context)].flatten
end
# puts "Pieces: #{pieces.inspect}"
pieces.each do |p|
if p.size + line.size > line_length
out << line.strip << "\n";
line = ""
end
line << p
end
end
out << line.strip << "\n" if line.size > 0
out << ?\n if not out[-1] == ?\n
out
end
def array_to_md(array, context, join_char='')
e = []
array.each do |c|
method = c.kind_of?(MDElement) ?
"to_md_#{c.node_type}" : "to_md"
if not c.respond_to?(method)
#raise "Object does not answer to #{method}: #{c.class} #{c.inspect[0,100]}"
# tell_user "Using default for #{c.node_type}"
method = 'to_md'
end
# puts "#{c.inspect} created with method #{method}"
h = c.send(method, context)
if h.nil?
raise "Nil md for #{c.inspect} created with method #{method}"
end
if h.kind_of?Array
e = e + h
else
e << h
end
end
e.join(join_char)
end
end end end
module MaRuKu; class MDDocument
alias old_md to_md
def to_md(context={})
s = old_md(context)
# puts s
s
end
end end