Class: ScripTTY::Net::Console

Inherits:
Object
  • Object
show all
Defined in:
lib/scriptty/net/console.rb

Constant Summary collapse

IAC_WILL_ECHO = 
"\377\373\001"
IAC_WONT_ECHO = 
"\377\374\001"
IAC_DO_ECHO = 
"\377\375\001"
IAC_DONT_ECHO = 
"\377\376\001"
IAC_WILL_SUPPRESS_GA = 
"\377\373\003"
IAC_WONT_SUPPRESS_GA = 
"\377\374\003"
IAC_DO_SUPPRESS_GA = 
"\377\375\003"
IAC_DONT_SUPPRESS_GA = 
"\377\376\003"

Instance Method Summary collapse

Constructor Details

#initialize(conn, app) ⇒ Console

Returns a new instance of Console.



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# File 'lib/scriptty/net/console.rb', line 14

def initialize(conn, app)
  @conn = conn
  @app = app
  conn.on_receive_bytes { |bytes| handle_receive_bytes(bytes) }
  conn.on_close { |bytes| handle_close }
  conn.write(IAC_WILL_ECHO + IAC_DONT_ECHO)   # turn echoing off
  conn.write(IAC_WILL_SUPPRESS_GA + IAC_DO_SUPPRESS_GA)   # turn line-buffering off (RFC 858)
  conn.write("\ec") # reset terminal (clear screen; reset attributes)
  @refresh_in_progress = false
  @need_another_refresh = false
  @prompt_input = ""
end

Instance Method Details

#refresh! ⇒ Object 



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# File 'lib/scriptty/net/console.rb', line 27

def refresh!
  if @refresh_in_progress
    @need_another_refresh = true
    return
  end
  screen_lines = []
  screen_lines << "# #{@prompt_input}"  # prompt
  if @app.term
    term_width = @app.term.width
    screen_lines << "Cursor position: #{@app.term.cursor_pos.inspect}"
    screen_lines << "+" + "-"*term_width + "+"
    @app.term.text.each do |line|
      screen_lines << "|#{line}|"
    end
    screen_lines << "+" + "-"*term_width + "+"
  else
    term_width = 80
    screen_lines << "[ No terminal ]"
  end
  if @app.respond_to?(:log_messages)
    screen_lines << ""
    @app.log_messages.each do |line|
      if line.length > term_width
        line = line[0,term_width-1]
        line += ">"
      end
      screen_lines << ":#{line}"
    end
  end
  output = []
  output << "\e[H"
  output << screen_lines.map{|line| line + "\e[K" + "\r\n"}.join   # erase to end of line after each line
  output << "\e[;#{3+@prompt_input.length}H" # return to prompt
  @refresh_in_progress = true
  @conn.write(output.join) {
    @refresh_in_progress = false
    if @need_another_refresh
      @need_another_refresh = false
      refresh!
    end
  }
  nil
end