Module: UnicodeNamecode::Aliases

Defined in:
lib/unicode_namecode/aliases.rb

Overview

Handles Unicode name aliases for alternative character names

Constant Summary collapse

ALIASES_PATH = 
File.expand_path('../../../data/NameAliases.txt', __FILE__)

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.alias_to_codepoint ⇒ Object (readonly)

Returns the value of attribute alias_to_codepoint.



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# File 'lib/unicode_namecode/aliases.rb', line 11

def alias_to_codepoint
  @alias_to_codepoint
end

.codepoint_to_aliases ⇒ Object (readonly)

Returns the value of attribute codepoint_to_aliases.



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# File 'lib/unicode_namecode/aliases.rb', line 11

def codepoint_to_aliases
  @codepoint_to_aliases
end

Class Method Details

.aliases_for_codepoint(codepoint) ⇒ Object

Get all aliases for a codepoint



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# File 'lib/unicode_namecode/aliases.rb', line 46

def aliases_for_codepoint(codepoint)
  load_aliases_data unless @codepoint_to_aliases
  @codepoint_to_aliases[codepoint] || []
end

.codepoint_for_alias(alias_name) ⇒ Object

Get the codepoint for an alias name



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# File 'lib/unicode_namecode/aliases.rb', line 40

def codepoint_for_alias(alias_name)
  load_aliases_data unless @alias_to_codepoint
  @alias_to_codepoint[alias_name.upcase]
end

.is_alias?(name) ⇒ Boolean

Check if a name is an alias

Returns:

  • (Boolean) 


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# File 'lib/unicode_namecode/aliases.rb', line 52

def is_alias?(name)
  load_aliases_data unless @alias_to_codepoint
  @alias_to_codepoint.key?(name.upcase)
end

.load_aliases_data ⇒ Object

Parse NameAliases.txt and build lookup tables



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# File 'lib/unicode_namecode/aliases.rb', line 14

def load_aliases_data
  @alias_to_codepoint = {}
  @codepoint_to_aliases = {}
  return unless File.exist?(ALIASES_PATH)
  
  File.foreach(ALIASES_PATH) do |line|
    next if line.strip.empty? || line.start_with?('#')
    
    # Parse lines like: "0000;NULL;control"
    if line =~ /^([0-9A-F]+);([^;]+);(.+)$/
      codepoint_hex, alias_name, alias_type = $1, $2, $3
      
      codepoint = codepoint_hex.to_i(16)
      alias_upper = alias_name.upcase
      
      # Store alias -> codepoint mapping
      @alias_to_codepoint[alias_upper] = codepoint
      
      # Store codepoint -> aliases mapping
      @codepoint_to_aliases[codepoint] ||= []
      @codepoint_to_aliases[codepoint] << { name: alias_upper, type: alias_type }
    end
  end
end