lib/radiant/.svn/text-base/taggable.rb.svn-base

   1 module Radiant::Taggable
   2   mattr_accessor :last_description, :tag_descriptions
   3   @@tag_descriptions = {}
   4
   5   def self.included(base)
   6     base.extend(ClassMethods)
   7     base.module_eval do
   8       def self.included(new_base)
   9         super
  10         new_base.tag_descriptions.merge! self.tag_descriptions
  11       end
  12     end
  13   end
  14
  15   def render_tag(name, tag_binding)
  16     send "tag:#{name}", tag_binding
  17   end
  18
  19   def tags
  20     Util.tags_in_array(methods)
  21   end
  22
  23   def tag_descriptions(hash=nil)
  24     self.class.tag_descriptions hash
  25   end
  26
  27   module ClassMethods
  28     def inherited(subclass)
  29       subclass.tag_descriptions.reverse_merge! self.tag_descriptions
  30       super
  31     end
  32
  33     def tag_descriptions(hash = nil)
  34       Radiant::Taggable.tag_descriptions[self.name] ||= (hash ||{})
  35     end
  36
  37     def desc(text)
  38       Radiant::Taggable.last_description = RedCloth.new(Util.strip_leading_whitespace(text)).to_html
  39     end
  40
  41     def tag(name, &block)
  42       self.tag_descriptions[name] = Radiant::Taggable.last_description if Radiant::Taggable.last_description
  43       Radiant::Taggable.last_description = nil
  44       define_method("tag:#{name}", &block)
  45     end
  46
  47     def tags
  48       Util.tags_in_array(self.instance_methods)
  49     end
  50
  51   end
  52
  53   module Util
  54     def self.tags_in_array(array)
  55       array.grep(/^tag:/).map { |name| name[4..-1] }.sort
  56     end
  57
  58     def self.strip_leading_whitespace(text)
  59       text = text.dup
  60       text.gsub!("\t", "  ")
  61       lines = text.split("\n")
  62       leading = lines.map do |line|
  63         unless line =~ /^\s*$/
  64            line.match(/^(\s*)/)[0].length
  65         else
  66           nil
  67         end
  68       end.compact.min
  69       lines.inject([]) {|ary, line| ary << line.sub(/^[ ]{#{leading}}/, "")}.join("\n")
  70     end
  71
  72   end
  73
  74 end