Class: Mack::Utils::RegistryMap

Inherits:
Object
  • Object
show all
Includes:
Extlib::Hook, Singleton
Defined in:
lib/mack-facets/utils/registry_map.rb

Overview

Provides a convenient way to register items in a map.

The structure of the registry is { :tag => [content] }, and the items within the array can be arranged anyway the user sees fit.

ds - july 2008

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Extlib::Hook

included

Constructor Details

#initialize ⇒ RegistryMap

:nodoc:



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# File 'lib/mack-facets/utils/registry_map.rb', line 20

def initialize # :nodoc:
  reset!
end

Instance Attribute Details

#registered_items ⇒ Object (readonly)

The list of registered items



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# File 'lib/mack-facets/utils/registry_map.rb', line 18

def registered_items
  @registered_items
end

Class Method Details

.add(tag, klass, position = -1)) ⇒ Object

Adds an object to the list at a specified position. By default the position is last.



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# File 'lib/mack-facets/utils/registry_map.rb', line 70

def add(tag, klass, position = -1)
  self.instance.add(tag, klass, position)
end

.clear! ⇒ Object

Emptys out the list of registered_items.



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# File 'lib/mack-facets/utils/registry_map.rb', line 60

def clear!
  registered_items.clear
end

.move_to_bottom(tag, klass) ⇒ Object

Moves an object to the bottom of the registered_items list.



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# File 'lib/mack-facets/utils/registry_map.rb', line 85

def move_to_bottom(tag, klass)
  remove(tag, klass)
  self.instance.add(tag, klass)
end

.move_to_top(tag, klass) ⇒ Object

Moves an object to the top of the registered_items list.



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# File 'lib/mack-facets/utils/registry_map.rb', line 80

def move_to_top(tag, klass)
  self.instance.add(tag, klass, 0)
end

.registered_items ⇒ Object

Returns the list of registered items.



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# File 'lib/mack-facets/utils/registry_map.rb', line 55

def registered_items
  self.instance.registered_items
end

.remove(tag, klass) ⇒ Object

Removes an object from the list.



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# File 'lib/mack-facets/utils/registry_map.rb', line 75

def remove(tag, klass)
  self.instance.remove(tag, klass)
end

.reset! ⇒ Object

Resets the registered_items list to the list specified by the initial_state method.



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# File 'lib/mack-facets/utils/registry_map.rb', line 65

def reset!
  self.instance.reset!
end

Instance Method Details

#add(tag, klass, position = -1)) ⇒ Object

Adds an object to the list at a specified position. By default the position is last.



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# File 'lib/mack-facets/utils/registry_map.rb', line 36

def add(tag, klass, position = -1)
  @registered_items[tag] ||= []
  arr = self.registered_items[tag]
  position = arr.size if position == -1
  
  arr.insert(position, klass)
  arr.uniq!
  arr.compact!
end

#initial_state ⇒ Object

Override this method to set the initial state of the registered_items Array. By default this list is empty.



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# File 'lib/mack-facets/utils/registry_map.rb', line 26

def initial_state
  {}
end

#remove(tag, klass) ⇒ Object

Removes an object from the list.



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# File 'lib/mack-facets/utils/registry_map.rb', line 47

def remove(tag, klass)
  return false if @registered_items[tag] == nil
  self.registered_items[tag].delete(klass)
end

#reset! ⇒ Object

Resets the registered_items list to the list specified by the initial_state method.



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# File 'lib/mack-facets/utils/registry_map.rb', line 31

def reset!
  @registered_items = self.initial_state.dup
end