Class: BashParser

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

Constant Summary collapse

INACTIVE = 
nil
ESCAPE_BYTE = 
27
CURSOR_MOVEMENT_ESCAPE_CHARS = 
['H', 'J']

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BashParser

Returns a new instance of BashParser.



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# File 'lib/bashparser.rb', line 13

def initialize
  reset_buffer
end

Class Method Details

.is_complete_escape_code(escape_code) ⇒ Object

assumes escape character is removed



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# File 'lib/bashparser.rb', line 75

def self.is_complete_escape_code(escape_code)#assumes escape character is removed
  return false if escape_code == '' or escape_code == nil
  escape_code[-1] != escape_code[-1].dup.swapcase
end

.seperate_by_escape_codes(input) ⇒ Object 



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# File 'lib/bashparser.rb', line 45

def self.seperate_by_escape_codes(input)
  return_data = []
  escape_code_list = []
  input = input + ESCAPE_BYTE.chr #Insures last string is inserted into return_data

  escape_code = INACTIVE
  string = ''
  input.each_byte do |byte|
    char = byte.chr

    if byte == ESCAPE_BYTE
      escape_code = ''
      if string != ''
        return_data << [string, escape_code_list ]
        string = ''
        escape_code_list = []
      end
    elsif escape_code != INACTIVE
      escape_code += char
      if is_complete_escape_code(escape_code)
        escape_code_list << "#{ESCAPE_BYTE.chr}#{escape_code}"
        escape_code = INACTIVE
      end
    else
      string += char
    end
  end
  return_data
end

Instance Method Details

#display_screen(all_input = nil) ⇒ Object 



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# File 'lib/bashparser.rb', line 17

def display_screen(all_input = nil)
  data = []
  if all_input != nil
    reset_buffer
    data = parse_input(all_input)
  else
    data = get_buffer_contents
  end
  data.each { |line| puts line }
end

#parse_input(input) ⇒ Object 



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# File 'lib/bashparser.rb', line 28

def parse_input(input)
  input.each_byte do |byte|
    write_byte_to_buffer(byte) if @escape_code == INACTIVE
    read_for_escape_codes(byte)
  end
  get_buffer_contents
end

#reset_buffer ⇒ Object 



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# File 'lib/bashparser.rb', line 6

def reset_buffer
  @x = 0
  @y = 0
  @buffer = []
  @escape_code = INACTIVE
end

#save_input_to_file(input, file_name) ⇒ Object 



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# File 'lib/bashparser.rb', line 36

def save_input_to_file(input, file_name)
  #used for debugging purposes
  File.open(file_name, 'w') do |f|
    input.dup.each_byte do |byte|
      f.putc(byte)
    end
  end
end