lib/akkordarbeit/html_formatter.rb

   1 # vim: fileencoding=UTF-8 ft=ruby syn=ruby ts=2 sw=2 ai eol et si
   2
   3 # Copyright (c) 2009 Jörg W Mittag <mailto:JoergWMittag+Akkordarbeit@GoogleMail.Com>
   4 # This code is licensed under the terms of the MIT License (see LICENSE.rdoc)
   5
   6 libdir = File.expand_path(File.dirname __FILE__).gsub(/(.*lib).*?/, '\1')
   7 $LOAD_PATH.unshift libdir unless $LOAD_PATH.include? libdir
   8
   9 require 'cgi'
  10
  11 module Akkordarbeit
  12   class HtmlFormatter
  13     def format(parsetree, title = 'Song-Sheet')
  14       output =  <<-"HERE"
  15 <!DOCTYPE html>
  16 <html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>
  17         <head>
  18                 <meta http-equiv='Content-type'     content='text/html; charset=UTF-8' />
  19                 <title>#{escape(title)}</title>
  20                 <meta http-equiv='content-language' content='en' />
  21                 <style>
  22                         p {
  23                                 line-height: 300%;
  24                                 max-width: 30em;
  25                         }
  26                         .chord {
  27                                 position: relative;
  28                         }
  29                         .chord span {
  30                                 position: absolute;
  31                                 bottom: 40%;
  32                                 font-size: 66%;
  33                                 font-weight: bold;
  34                         }
  35                         .chord .brackets {
  36                                 display: none;
  37                         }
  38                 </style>
  39         </head>
  40         <body>
  41                 <header>
  42                         <h1>#{escape(title)}</h1>
  43                 </header>
  44                 <section>
  45       HERE
  46       parsetree.each do |section|
  47         output << "\t"*3 << "<p>\n"
  48         section.each do |line|
  49           output << "\t"*4
  50           last_chord = nil
  51           line.each do |token|
  52             regex = /(?:\[(.*?)\])/
  53             if regex.match(token)
  54               last_chord = $1
  55             else
  56               unless last_chord
  57                 output << escape(token)
  58               else
  59                 token = '&nbsp;' if token =~ /^\s$/
  60                 output << "<span class='chord'><span><span class='brackets'>[</span>#{escape(last_chord)}<span class='brackets'>]</span></span>#{escape(token)}</span>"
  61                 last_chord = nil
  62               end
  63             end
  64           end
  65           output << "<br />\n"
  66         end
  67         output.gsub! %r|<br />\Z|, ''
  68         output << "\t"*3 << "</p>\n"
  69       end
  70       return output << <<-'HERE'
  71                 </section>
  72         </body>
  73 </html>
  74     HERE
  75     end
  76
  77     private
  78
  79     def escape(str)
  80       return CGI.escapeHTML(str)
  81     end
  82   end
  83 end