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

   1 require 'simpleton'
   2
   3 module Radiant
   4   class AdminUI
   5
   6     class DuplicateTabNameError < StandardError; end
   7
   8     class Tab
   9       attr_accessor :name, :url, :visibility
  10
  11       def initialize(name, url, options = {})
  12         @name, @url = name, url
  13         @visibility = [options[:for], options[:visibility]].flatten.compact
  14         @visibility = [:all] if @visibility.empty?
  15       end
  16
  17       def shown_for?(user)
  18         visibility.include?(:all) or
  19           visibility.any? { |role| user.send("#{role}?") }
  20       end
  21     end
  22
  23     class TabSet
  24       def initialize
  25         @tabs = []
  26       end
  27
  28       def add(name, url, options = {})
  29         options.symbolize_keys!
  30         before = options.delete(:before)
  31         after = options.delete(:after)
  32         tab_name = before || after
  33         if self[name]
  34           raise DuplicateTabNameError.new("duplicate tab name `#{name}'")
  35         else
  36           if tab_name
  37             index = @tabs.index(self[tab_name])
  38             index += 1 if before.nil?
  39             @tabs.insert(index, Tab.new(name, url, options))
  40           else
  41             @tabs << Tab.new(name, url, options)
  42           end
  43         end
  44       end
  45
  46       def remove(name)
  47         @tabs.delete(self[name])
  48       end
  49
  50       def size
  51         @tabs.size
  52       end
  53
  54       def [](index)
  55         if index.kind_of? Integer
  56           @tabs[index]
  57         else
  58           @tabs.find { |tab| tab.name == index }
  59         end
  60       end
  61
  62       def each
  63         @tabs.each { |t| yield t }
  64       end
  65
  66       def clear
  67         @tabs.clear
  68       end
  69
  70       include Enumerable
  71     end
  72
  73     include Simpleton
  74
  75     attr_accessor :tabs
  76
  77     def initialize
  78       @tabs = TabSet.new
  79     end
  80
  81   end
  82 end