lib/themes/loader.rb

   1 class ThemeLoader
   2   BASE_DIR = File.dirname(__FILE__)
   3
   4   def initialize
   5     # load all ruby files in subdirectories
   6     Dir[File.join(BASE_DIR, '*')].each do |f|
   7       if File.directory?(f)
   8         Dir[File.join(f, '*.rb')].each do |rb_file|
   9           require rb_file
  10         end
  11       end
  12     end
  13
  14     @themes = {}
  15     ObjectSpace::each_object(Class) do |k|
  16       if k.include? Theme
  17         @themes[k.theme_name] = k
  18       end
  19     end
  20
  21   end
  22
  23   def each(&blk)
  24     @themes.each_value(&blk)
  25   end
  26
  27   def get(name, game, opts = { })
  28     instantiate @themes[name]
  29   end
  30
  31   def get_matching(preferred, game, required, optional, opts = {})
  32     pref = @themes[preferred]
  33     return instantiate(pref, game, opts) if pref and pref.matches?(required)
  34
  35     themes = @themes.values.reject {|x| not x.matches?(required) }.sort_by {|x| x.score(optional) }
  36     if themes.empty?
  37       raise "No valid theme"
  38     else
  39       instantiate themes.last, game, opts
  40     end
  41   end
  42
  43   private
  44
  45   def instantiate(theme, game, opts = {})
  46     theme.new(opts.merge(:game => game))
  47   end
  48 end