Class: UI::ReadlineWindow

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ReadlineWindow

Returns a new instance of ReadlineWindow.



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# File 'lib/ektoplayer/ui.rb', line 156

def initialize
   Readline.input, @readline_in_write = IO.pipe
   Readline.output = File.open(File::NULL, ?w)
   @window = ICurses.newwin(0,0,0,0)
   @thread = nil
end

Instance Method Details

#active? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ektoplayer/ui.rb', line 163

def active?; !@thread.nil?  end

#feed(c) ⇒ Object 



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# File 'lib/ektoplayer/ui.rb', line 194

def feed(c)
   @readline_in_write.putc(c)
   Thread.pass
   @thread = nil if c == ?\n.ord
   redraw
end

#readline(pos, size, prompt: '', add_hist: false, &block) ⇒ Object 



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# File 'lib/ektoplayer/ui.rb', line 177

def readline(pos, size, prompt: '', add_hist: false, &block)
   @thread ||= Thread.new do
      @size, @pos, @prompt = size, pos, prompt

      begin
         Readline.set_screen_size(size.height, size.width)
         Readline.delete_text
         @readline_in_write.read_nonblock(100) rescue nil
         block.(Readline.readline(prompt, add_hist))
      ensure
         @window.clear
         @thread = nil
         UI::Canvas.update_screen(true)
      end
   end
end

#redraw ⇒ Object 



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# File 'lib/ektoplayer/ui.rb', line 165

def redraw
   @window.resize(@size.height, @size.width)
   @window.mvwin(@pos.y, @pos.x)
   @window.erase
   buffer = @prompt + Readline.line_buffer.to_s
   @window.addstr(buffer[(buffer.size - @size.width).clamp(0, buffer.size)..-1])
   @window.move(0, Readline.point + @prompt.size)
   @window.refresh
rescue
   nil
end