# redMine - project management software # Copyright (C) 2006-2007 Jean-Philippe Lang # # This program 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. # # This program 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 this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. require 'redcloth' require 'coderay' module Redmine module WikiFormatting private class TextileFormatter < RedCloth # auto_link rule after textile rules so that it doesn't break !image_url! tags RULES = [:textile, :block_markdown_rule, :inline_auto_link, :inline_auto_mailto, :inline_toc, :inline_macros] def initialize(*args) super self.hard_breaks=true self.no_span_caps=true end def to_html(*rules, &block) @toc = [] @macros_runner = block super(*RULES).to_s end private # Patch for RedCloth. Fixed in RedCloth r128 but _why hasn't released it yet. # http://code.whytheluckystiff.net/redcloth/changeset/128 def hard_break( text ) text.gsub!( /(.)\n(?!\n|\Z|>| *(>? *[#*=]+(\s|$)|[{|]))/, "\\1
\n" ) if hard_breaks end # Patch to add code highlighting support to RedCloth def smooth_offtags( text ) unless @pre_list.empty? ## replace 
 content
          text.gsub!(//) do
            content = @pre_list[$1.to_i]
            if content.match(/\s?(.+)/m)
              content = "" + 
                CodeRay.scan($2, $1.downcase).html(:escape => false, :line_numbers => :inline)
            end
            content
          end
        end
      end
      
      # Patch to add 'table of content' support to RedCloth
      def textile_p_withtoc(tag, atts, cite, content)
        if tag =~ /^h(\d)$/
          @toc << [$1.to_i, content]
        end
        content = "" + content
        textile_p(tag, atts, cite, content)
      end

      alias :textile_h1 :textile_p_withtoc
      alias :textile_h2 :textile_p_withtoc
      alias :textile_h3 :textile_p_withtoc
      
      def inline_toc(text)
        text.gsub!(/
\{\{([<>]?)toc\}\}<\/p>/i) do
          div_class = 'toc'
          div_class << ' right' if $1 == '>'
          div_class << ' left' if $1 == '<'
          out = "
"
          @toc.each_with_index do |heading, index|
            # remove wiki links from the item
            toc_item = heading.last.gsub(/(\[\[|\]\])/, '')
            # remove styles
            # eg. %{color:red}Triggers% => Triggers
            toc_item.gsub! %r[%\{[^\}]*\}([^%]+)%], '\\1'
            out << "#{toc_item}"
          end
          out << '
'
          out
        end
      end
      
      MACROS_RE = /
                    (!)?                        # escaping
                    (
                    \{\{                        # opening tag
                    ([\w]+)                     # macro name
                    (\(([^\}]*)\))?             # optional arguments
                    \}\}                        # closing tag
                    )
                  /x unless const_defined?(:MACROS_RE)
      
      def inline_macros(text)
        text.gsub!(MACROS_RE) do
          esc, all, macro = $1, $2, $3.downcase
          args = ($5 || '').split(',').each(&:strip)
          if esc.nil?
            begin
              @macros_runner.call(macro, args)
            rescue => e
              "
Error executing the #{macro} macro (#{e})
"
            end || all
          else
            all
          end
        end
      end
      
      AUTO_LINK_RE = %r{
                        (                          # leading text
                          <\w+.*?>|                # leading HTML tag, or
                          [^=<>!:'"/]|             # leading punctuation, or 
                          ^                        # beginning of line
                        )
                        (
                          (?:https?://)|           # protocol spec, or
                          (?:ftp://)|
                          (?:www\.)                # www.*
                        )
                        (
                          (\S+?)                   # url
                          (\/)?                    # slash
                        )
                        ([^\w\=\/;]*?)               # post
                        (?=<|\s|$)
                       }x unless const_defined?(:AUTO_LINK_RE)

      # Turns all urls into clickable links (code from Rails).
      def inline_auto_link(text)
        text.gsub!(AUTO_LINK_RE) do
          all, leading, proto, url, post = $&, $1, $2, $3, $6
          if leading =~ /=]?/
            # don't replace URL's that are already linked
            # and URL's prefixed with ! !> !< != (textile images)
            all
          else            
            %(#{leading}#{proto + url}#{post})
          end
        end
      end

      # Turns all email addresses into clickable links (code from Rails).
      def inline_auto_mailto(text)
        text.gsub!(/([\w\.!#\$%\-+.]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
          mail = $1
          if text.match(/]*>(.*)(#{Regexp.escape(mail)})(.*)<\/a>/)
            mail
          else
            %{}
          end
        end
      end
    end
    
  public
  
    def self.to_html(text, options = {}, &block)
      TextileFormatter.new(text).to_html(&block)
    end
  end
end