Module: Ncurses

Defined in:
lib/sup/buffer.rb

Constant Summary collapse

KEY_ENTER = 
10
KEY_CANCEL =

ctrl-g

7
KEY_TAB = 
9

Class Method Summary collapse

Class Method Details

.cols ⇒ Object 



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# File 'lib/sup/buffer.rb', line 14

def cols
  lame, lamer = [], []
  stdscr.getmaxyx lame, lamer
  lamer.first
end

.curx ⇒ Object 



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# File 'lib/sup/buffer.rb', line 20

def curx
  lame, lamer = [], []
  stdscr.getyx lame, lamer
  lamer.first
end

.mutex ⇒ Object 



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# File 'lib/sup/buffer.rb', line 26

def mutex; @mutex ||= Mutex.new; end

.nonblocking_getch ⇒ Object

magically, this stuff seems to work now. i could swear it didn’t before. hm.



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# File 'lib/sup/buffer.rb', line 31

def nonblocking_getch
  ## INSANTIY
  ## it is NECESSARY to wrap Ncurses.getch in a select() otherwise all
  ## background threads will be BLOCKED. (except in very modern versions
  ## of libncurses-ruby. the current one on ubuntu seems to work well.)
  if IO.select([$stdin], nil, nil, 0.5)
    if Redwood::BufferManager.shelled?
      # If we get input while we're shelled, we'll ignore it for the
      # moment and use Ncurses.sync to wait until the shell_out is done.
      Ncurses.sync { nil }
    else
      Ncurses.getch
    end
  end
end

.rows ⇒ Object 



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# File 'lib/sup/buffer.rb', line 8

def rows
  lame, lamer = [], []
  stdscr.getmaxyx lame, lamer
  lame.first
end

.safe_nonblocking_getch ⇒ Object

pretends ctrl-c’s are ctrl-g’s



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# File 'lib/sup/buffer.rb', line 48

def safe_nonblocking_getch
  nonblocking_getch
rescue Interrupt
  KEY_CANCEL
end

.sync(&b) ⇒ Object 



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# File 'lib/sup/buffer.rb', line 27

def sync &b; mutex.synchronize(&b); end