Class: Latexmath::Tokenizer

Inherits:
StringScanner
  • Object
show all
Defined in:
lib/latexmath/tokenizer.rb

Instance Method Summary collapse

Instance Method Details

#fetch_token ⇒ Object 



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# File 'lib/latexmath/tokenizer.rb', line 20

def fetch_token
  skip(/\s+/)
  skip(/\$\$/)

  token = if scan(/\\mathbb\{[^}]+}/)
            if Latexmath::Symbol.get(matched)
              "&#x#{Latexmath::Symbol.get(matched)};"
            else
              matched
            end
          elsif scan(/{\\bf [^}]+}/)
            matches = matched.match(/{\\bf ([^}]+)}/)
            symbol = Latexmath::Symbol.get("\\mathbf{#{matches[1]}}")
            "&#x#{symbol};" if symbol
          elsif scan(/\\\\\[\d+mm\]/)
            '\\\\' # matched
          elsif scan(/\\mbox{[^\}]+}/)
            matched
          elsif scan(/\\Delta/)
            matched
          elsif scan(/\\vec{[^\}]+}/)
            matched
          elsif scan(/\\hat{[^\}]+}/)
            matched
          elsif scan(/\\textrm{[^\}]+}/)
            matched
          elsif scan(/{\\rm [^}]+}/)
            matches = matched.match(/{\\rm ([^}]+)}/)
            matches[1]
          elsif scan(/\\[a-z]+\{(bmatrix|Bmatrix|matrix|vmatrix|Vmatrix|array|pmatrix|split)\*?\}/)
            matched
          elsif scan(/\\[a-z]+/)
            matched
          elsif scan(/\\\\/)
            matched
          elsif scan(/\\\[/)
            matched
          elsif scan(/\\\]/)
            matched
          elsif scan(/\\\{/)
            matched
          elsif scan(/\\[:;,]/)
            matched
          elsif scan(/\\/)
            matched
          elsif scan(/[a-z]/)
            matched
          elsif scan(/[0-9]+\.[0-9]+/)
            matched
          elsif scan(/[0-9]+/)
            matched
          elsif scan(/ /)
            matched
          elsif scan(/[\{\}\*]/)
            matched
          elsif scan(/./)
            matched
          end

  token
end

#tokenize ⇒ Object 



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# File 'lib/latexmath/tokenizer.rb', line 5

def tokenize
  exp = []

  while token = fetch_token
    exp << token
  end

  if exp.first == '\[' && exp.last == '\]'
    exp.pop
    exp.shift
  end

  exp
end