Class: LogoNxc

Inherits:
Object
  • Object
show all
Defined in:
lib/logonxc.rb

Class Method Summary collapse

Class Method Details

.nxc(logo) ⇒ Object 



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# File 'lib/logonxc.rb', line 43

def self.nxc()
  wrap(parse())
end

.parse(text) ⇒ Object

ok so this probably isn’t the best way to write a language parser :)



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# File 'lib/logonxc.rb', line 12

def self.parse text
  output = ""
  text.each_line do |line|
    case
    when line =~ /print\s+["']([^"']+)["']/
      output << "print(\"#{$1}\");\n"
    when line =~ /sleep\s+(\d+)/
      output << "wait(#{$1});\n"
    when line =~ /beep/
      output << "beep();\n"
    when line =~ /repeat\s+(\d+)\s+\[/
      output << "repeat(#{$1}) {\n"
    when line =~ /(?:right|rt)\s*(\d+)/
      output << "right(#{$1});\n"
    when line =~ /(?:left|lt)\s*(\d+)/
      output << "left(#{$1});\n"
    when line =~ /(?:forward|fd)\s*(\d+)/
      output << "forward(#{$1});\n"
    when line =~ /(?:back|bk)\s*(\d+)/
      output << "back(#{$1});\n"
    when line =~ /penup/
      output << "penup();\n"
    when line =~ /pendown/
      output << "pendown();\n"
    when line =~ /\]/
      output << "}\n"
    end
  end
  output
end

.wrap(nxc_block) ⇒ Object 



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# File 'lib/logonxc.rb', line 5

def self.wrap(nxc_block)
  tpl = File.expand_path(File.dirname(__FILE__) + "/../templates/logonxc.erb")
  template = Erubis::Eruby.new File.new(tpl).read
  template.result(:nxc_block => nxc_block)
end