Class: Emfsvg::Svg::PathData::Scanner

Inherits:
Object
  • Object
show all
Defined in:
lib/emfsvg/svg/path_data.rb

Overview

Character-stream tokenizer for path data. Emits command letters as Symbols (e.g. :M, :z) and numbers as Floats.

Constant Summary collapse

NUMBER_RE = 
/[+-]?(?:\d+\.?\d*|\.\d+)(?:[eE][+-]?\d+)?/

Instance Method Summary collapse

Constructor Details

#initialize(string) ⇒ Scanner

Returns a new instance of Scanner.



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# File 'lib/emfsvg/svg/path_data.rb', line 90

def initialize(string)
  @string = string
  @pos = 0
end

Instance Method Details

#next_token ⇒ Object 



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# File 'lib/emfsvg/svg/path_data.rb', line 95

def next_token
  skip_separators
  return nil if @pos >= @string.length

  char = @string[@pos]
  if command_letter?(char)
    @pos += 1
    char.to_sym
  else
    read_number
  end
end