Class: Screen

Inherits:
Object
  • Object
show all
Includes:
Curses
Defined in:
lib/pingman/screen.rb

Constant Summary collapse

TOP_OFFSET = 
0
LETF_OFFSET = 
2
RIGHT_OFFSET = 
5
TIME_LOW = 
1
HOSTNAME_WIDTH = 
15
RESULT_WIDTH = 
15
COL_OFFSET = 
3

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/pingman/screen.rb', line 17

def initialize
  init_screen
  start_color
  Curses.init_pair 1, COLOR_WHITE, COLOR_GREEN
  Curses.init_pair 2, COLOR_WHITE, COLOR_RED
  curs_set 0
  noecho
  sleep 0.05
  @lines = []
  @current_cols = cols
  @hostname = Socket.gethostname
  @hostaddr = Socket.getaddrinfo(Socket::gethostname, nil, Socket::AF_INET)[0][3]
  update
end

Instance Attribute Details

#lines ⇒ Object

Returns the value of attribute lines.



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# File 'lib/pingman/screen.rb', line 6

def lines
  @lines
end

Instance Method Details



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# File 'lib/pingman/screen.rb', line 32

def print_header(line_num)
  title = 'Ping Man'
  setpos(line_num, (cols - title.length) / 2)
  addstr(title)
  line_num += 1

  host = "#{@hostname}(#{@hostaddr})"
  setpos(line_num, LETF_OFFSET)
  addstr(host)
  line_num += 1

  usage = 'Keytype: [a] Display addr, [i] ping interval, [t] ping timeout, [q]uit'
  setpos(line_num, LETF_OFFSET)
  addstr(usage)
  line_num += 1

  line_num += 1

  offset = LETF_OFFSET
  setpos(line_num, offset)
  addstr('HOSTNAME')
  offset += HOSTNAME_WIDTH
  setpos(line_num, offset)
  addstr('ADDRESS')
  offset = cols - RIGHT_OFFSET - RESULT_WIDTH
  setpos(line_num, offset)
  addstr('RESULT')
  offset -= 'SNT'.length + COL_OFFSET
  setpos(line_num, offset)
  addstr('SNT')
  offset -= 'AVG'.length + COL_OFFSET
  setpos(line_num, offset)
  addstr('AVG')
  offset -= 'RTT'.length + COL_OFFSET
  setpos(line_num, offset)
  addstr('RTT')
  offset -= 'LOSS%'.length + COL_OFFSET
  setpos(line_num, offset)
  addstr('LOSS%')
  line_num += 1
end

#print_line(line) ⇒ Object 



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# File 'lib/pingman/screen.rb', line 74

def print_line(line)
  setpos(@lines_low + line.row, 0)
  deleteln
  refresh
  insertln
  attron(A_BLINK) unless line.res
  setpos(@lines_low + line.row, LETF_OFFSET - 2)
  addstr('> ') if line.sending
  offset = LETF_OFFSET
  setpos(@lines_low + line.row, offset)
  addstr(line.hostname.to_s)
  offset += HOSTNAME_WIDTH
  setpos(@lines_low + line.row, offset)
  addstr(line.address.to_s)
  offset = cols - RIGHT_OFFSET - RESULT_WIDTH
  setpos(@lines_low + line.row, offset)
  addstr(line.log.slice(0, 15).map{|c| c ? '.' : '!'}.join)
  offset -= 'SNT'.length + COL_OFFSET
  setpos(@lines_low + line.row, offset + 'SNT'.length - line.snt.to_s.length)
  addstr(line.snt.to_s)
  offset -= 'AVG'.length + COL_OFFSET
  avg = (line.avg * 1000).round.to_s
  setpos(@lines_low + line.row, offset + 'AVG'.length - avg.length)
  addstr(avg)
  offset -= 'RTT'.length + COL_OFFSET
  rtt = (line.rtt * 1000).round.to_s
  setpos(@lines_low + line.row, offset + 'RTT'.length - rtt.length)
  addstr(rtt)
  offset -= 'LOSS%'.length + COL_OFFSET
  loss = "#{sprintf('%.1f',line.loss * 100)}%"
  setpos(@lines_low + line.row, offset + 'LOSS%'.length - loss.length)
  addstr(loss)
  offset -= '   OK   '.length + COL_OFFSET
  setpos(@lines_low + line.row, offset)
  if line.res
    attron(color_pair(1))
    addstr('   OK   ')
  else
    attron(color_pair(2))
    addstr('   NG   ')
  end
  attroff(A_COLOR)
  attroff(A_BLINK)
end

#print_lines ⇒ Object 



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# File 'lib/pingman/screen.rb', line 119

def print_lines
  @lines.each do |line|
    print_line line
  end if @lines
end

#print_time(line_num) ⇒ Object 



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# File 'lib/pingman/screen.rb', line 125

def print_time(line_num)
  time = "[last update #{Time.now.strftime("%m-%d %H:%M:%S")}]"
  setpos(line_num, cols - time.length - RIGHT_OFFSET)
  addstr(time)
  line_num += 1
end

#update ⇒ Object 



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# File 'lib/pingman/screen.rb', line 132

def update
  clear
  @lines_low = print_header(TOP_OFFSET)
  print_lines
  refresh
end

#update_line(line) ⇒ Object 



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# File 'lib/pingman/screen.rb', line 139

def update_line(line)
  if @current_cols != cols
    @current_cols = cols
    update
  end
  print_line line
  print_time TIME_LOW
  refresh
end