Module: ToAsciiLatex

Defined in:
lib/to_ascii_latex.rb,
lib/to_ascii_latex/version.rb

Constant Summary collapse

NBSP =

www.fileformat.info/info/unicode/char/fb01/index.htm www.w3.org/Math/characters/unicode.xml

"\u00A0"
MAPPING = 
{ "\u2014"  => "--",
  "\u2018"  => "`",
  "\u2019"  => "'",
  "\u201E"  => "``",
  "\u201C"  => "``",
  "\u201D"  => "''",
  "\u00A0"  => ' ',
  "\u00E6"  => '\ae{}',
  "\u00E0"  => '\\\\`{a}',
  "\u0097"  => '--',
  "\u0092"  => "'",
  "\u2026"  => '{}\ldots{}',
  "\uFB01"  => 'fi',
  "\uFB00"  => 'ff',
  "\u2013"  => '-',
  "\u25A0"  => '\ensuremath{\blacksquare}',
  "\u2022"  => '\ensuremath{\bullet}',
  "\u2248"  => '\ensuremath{\approx}',
  "\u0B0C"  => '?',
  "\u00B0"  => '\ensuremath{^{\circ}}',
  "\u00A7"  => '\S{}',
  "\u20AC"  => '\euro{}',
  "\u00A2"  => '\textcent{}',
  "\u2227"  => '\ensuremath{\land}',
  "\u00AC"  => '\ensuremath{\neg}',
  "\u00F6"  => '\"{o}',
}
MAPPING_RE = 
/#{MAPPING.keys.join('|')}/
VERSION = 
"0.0.18"
@@smartquotes = 
false
@@replace_nbsp = 
false

Class Method Summary collapse

Class Method Details

.extended(base) ⇒ Object

Add a hook - whenever a class or module calls ‘extend ToAsciiLatex`, run this code



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# File 'lib/to_ascii_latex.rb', line 57

def self.extended(base)

  # In the context of the extending module or class 
  # (in this case, it will be ToLatex), do the following
  base.class_eval do

    # Define this new method
    def self.new_escape(s)
      s = s.gsub(NBSP, ' ') if @@replace_nbsp
      x = old_escape(s).gsub(MAPPING_RE){|c| MAPPING[c]}.gsub('\backslash{}', '\ensuremath{\backslash}')
      warn "Unicode in  #{x.inspect}" if x.delete("^\u{0000}-\u{007F}") != x

      if @@smartquotes
        i = 0
        x.gsub!('"'){|q| i += 1; (i % 2 == 0) ? "''" : "``"}
      end

      return x
    end

    # Set up aliases. 
    # We're already in the context of the class, but there's no
    # `self.alias`, so we need to call `alias` inside this block
    class << self

      # We can call the original `escape` method with `old_escape`
      alias :old_escape :escape

      # If we call `escape`, now we'll get our `new_escape` method
      alias :escape :new_escape
    end
  end

end

.replace_nbsp ⇒ Object 



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# File 'lib/to_ascii_latex.rb', line 15

def self.replace_nbsp
  @@replace_nbsp
end

.replace_nbsp=(v) ⇒ Object 



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# File 'lib/to_ascii_latex.rb', line 18

def self.replace_nbsp=(v)
  raise "Unexpected value #{v.inspect} for replace_nbsp" unless [true, false].include?(v)
  @@replace_nbsp = v
end

.smartquotes ⇒ Object 



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# File 'lib/to_ascii_latex.rb', line 8

def self.smartquotes
  @@smartquotes
end

.smartquotes=(v) ⇒ Object 



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# File 'lib/to_ascii_latex.rb', line 11

def self.smartquotes=(v)
  raise "Unexpected value #{v.inspect} for smartquotes" unless [true, false].include?(v)
  @@smartquotes = v
end