Class: WindowBlessing::XtermOutput

Inherits:
Object
  • Object
show all
Includes:
SetColor, SetState
Defined in:
lib/window_blessing/xterm_output.rb

Defined Under Namespace

Modules: SetColor, SetState

Instance Attribute Summary collapse

Attributes included from SetColor

#current_bg, #current_fg

Instance Method Summary collapse

Methods included from SetState

#disable_alternate_screen, #disable_focus_events, #disable_mouse, #disable_utf8, #echo_off, #echo_on, #enable_alternate_screen, #enable_focus_events, #enable_mouse, #enable_utf8, #hide_cursor, #show_cursor

Methods included from SetColor

#change_bg, #change_fg, #out_color, #reset_color, #set_bg, #set_bold, #set_color, #set_color_24bit, #set_fg, #set_underline

Constructor Details

#initialize(xterm_state) ⇒ XtermOutput

Returns a new instance of XtermOutput.



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# File 'lib/window_blessing/xterm_output.rb', line 111

def initialize(xterm_state)
  @xterm_state = xterm_state
end

Instance Attribute Details

#xterm_state ⇒ Object

Returns the value of attribute xterm_state.



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# File 'lib/window_blessing/xterm_output.rb', line 109

def xterm_state
  @xterm_state
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 176

def clear; out "\e[2J"; end

#cursor(loc_or_x, y = nil) ⇒ Object

cursor 0, 0 is the upper left hand corner cursor point(0, 0) is also accepted



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# File 'lib/window_blessing/xterm_output.rb', line 117

def cursor(loc_or_x, y=nil)
  loc = y ? point(loc_or_x,y) : loc_or_x
  out "\e[#{loc.y+1};#{loc.x+1}H"
end

#disable_resize_events ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 200

def disable_resize_events
  Signal.trap "SIGWINCH", "DEFAULT"
end

#draw_buffer(loc, buffer) ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 158

def draw_buffer(loc, buffer)
  loc = loc.clone
  reset_color
  buffer.each_line do |line,fg,bg|
    out_at_with_color loc, line, fg, bg
    loc.y += 1
  end
end

#enable_resize_events ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 194

def enable_resize_events
  Signal.trap "SIGWINCH" do
    request_xterm_size
  end
end

#out(str) ⇒ Object

raw screen output



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# File 'lib/window_blessing/xterm_output.rb', line 123

def out(str)
  $stdout.print str
  str
end

#out_at(loc, str) ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 128

def out_at(loc, str)
  cursor(loc)
  out str
end

#out_at_with_color(loc, str, fg, bg) ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 133

def out_at_with_color(loc, str, fg, bg)
  return unless str.length > 0
  cursor loc

  change_fg fg[0]
  change_bg bg[0]

  current_attrs = [current_fg, current_bg]

  next_output_pos = 0
  pos = 0

  fg.zip(bg).each do |attrs|
    if current_attrs!=attrs
      out str[next_output_pos..pos-1]
      change_fg attrs[0]
      change_bg attrs[1]
      current_attrs = attrs
      next_output_pos = pos
    end
    pos += 1
  end
  out str[next_output_pos..-1]
end

#puts(s = nil) ⇒ Object

convert all n to nr



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# File 'lib/window_blessing/xterm_output.rb', line 168

def puts(s=nil)
  width = xterm_state.size.x
  lines = "#{s}\n".split("\n").collect do |line|
    line + " " * (width - (line.length % width))
  end
  out lines.flatten.join "\n"
end

#request_cursor_position ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 187

def request_cursor_position; out "\e[?6n"; end

#request_display_pixel_size ⇒ Object

INTERNAL NOTE: xterm returns 3 numbers: ?, height, width This returns the entire screen size in pixels - not just the pixel-size of the x-term



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# File 'lib/window_blessing/xterm_output.rb', line 185

def request_display_pixel_size; out "\e[14t"; end

#request_state_update ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 189

def request_state_update
  request_xterm_size
  request_display_pixel_size
end

#request_xterm_size ⇒ Object

INTERNAL NOTE: xterm returns 3 numbers: ?, height, width Xterm sends back response as an escape sequence. XtermEventParser knows how to capture and interpret the result.



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# File 'lib/window_blessing/xterm_output.rb', line 181

def request_xterm_size; out "\e[18t"; end

#reset_all ⇒ Object 



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# File 'lib/window_blessing/xterm_output.rb', line 204

def reset_all
  disable_focus_events
  disable_mouse
  disable_resize_events
  reset_color
  show_cursor
  echo_on
end