Class: SassC::Util::NormalizedMap

Inherits:
Object
  • Object
show all
Defined in:
lib/sassc/util/normalized_map.rb

Overview

A hash that normalizes its string keys while still allowing you to get back to the original keys that were stored. If several different values normalize to the same value, whichever is stored last wins.

Instance Method Summary collapse

Constructor Details

#initialize(map = nil) ⇒ NormalizedMap

Create a normalized map


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# File 'lib/sassc/util/normalized_map.rb', line 12

def initialize(map = nil)
  @key_strings = {}
  @map = {}
  map.each {|key, value| self[key] = value} if map
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 109

def method_missing(method, *args, &block)
  @map.send(method, *args, &block)
end

Instance Method Details

#[](k) ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 41

def [](k)
  @map[normalize(k)]
end

#[]=(k, v) ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 33

def []=(k, v)
  normalized = normalize(k)
  @map[normalized] = v
  @key_strings[normalized] = k
  v
end

#as_stored ⇒ Hash

Returns Hash with the keys as they were stored (before normalization).

Returns:

  • (Hash) —

    Hash with the keys as they were stored (before normalization).


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# File 'lib/sassc/util/normalized_map.rb', line 58

def as_stored
  SassC::Util.map_keys(@map) {|k| @key_strings[k]}
end

#delete(k) ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 51

def delete(k)
  normalized = normalize(k)
  @key_strings.delete(normalized)
  @map.delete(normalized)
end

#denormalize(key) ⇒ String

Returns the version of ‘key` as it was stored before normalization. If `key` isn’t in the map, returns it as it was passed in.

Returns:

  • (String) 

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# File 'lib/sassc/util/normalized_map.rb', line 28

def denormalize(key)
  @key_strings[normalize(key)] || key
end

#dup ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 94

def dup
  d = super
  d.send(:instance_variable_set, "@map", @map.dup)
  d
end

#each ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 74

def each
  @map.each {|k, v| yield(k, v)}
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/sassc/util/normalized_map.rb', line 62

def empty?
  @map.empty?
end

#has_key?(k) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/sassc/util/normalized_map.rb', line 46

def has_key?(k)
  @map.has_key?(normalize(k))
end

#keys ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 70

def keys
  @map.keys
end

#map ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 90

def map
  @map.map {|k, v| yield(k, v)}
end

#normalize(key) ⇒ Object

Specifies how to transform the key. This can be overridden to create other normalization behaviors.


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# File 'lib/sassc/util/normalized_map.rb', line 20

def normalize(key)
  key.tr("-", "_")
end

#respond_to_missing?(method, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/sassc/util/normalized_map.rb', line 113

def respond_to_missing?(method, include_private = false)
  @map.respond_to?(method, include_private)
end

#size ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 78

def size
  @map.size
end

#sort_by ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 100

def sort_by
  @map.sort_by {|k, v| yield k, v}
end

#to_a ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 86

def to_a
  @map.to_a
end

#to_hash ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 82

def to_hash
  @map.dup
end

#update(map) ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 104

def update(map)
  map = map.as_stored if map.is_a?(NormalizedMap)
  map.each {|k, v| self[k] = v}
end

#values ⇒ Object 


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# File 'lib/sassc/util/normalized_map.rb', line 66

def values
  @map.values
end