import threading
import curses

class CLine(threading.Thread):
	# Initialize ncurses stuff
	def __init__(self):
		threading.Thread.__init__(self)
		self.stdscr = curses.initscr()
		self.maxSize = self.stdscr.getmaxyx()
		curses.cbreak()
		curses.noecho()
		self.stdscr.keypad(1)
		self.input = ""
		self.pos = (0,0) # REMEMBER: (y,x)
		self.start()


	# Reverse ncurses stuff
	def quit(self):
		curses.nocbreak()
		curses.echo()
		self.stdscr.keypad(0)
		curses.endwin()


	# Print the prompt
	def prompt(self):
		self.stdscr.addstr(self.pos[0],0,">>> ")


	# Run the command line
	def run(self):
		try:
			self.prompt()
			while(True):
				#self.prompt()
				self.pos=self.stdscr.getyx()
				c = self.stdscr.getch()
				if c==10:
					if self.enter()==False:
						return
				else:
					self.input+=curses.keyname(c)
					self.changeline()
		finally:
			self.quit()


	# Enter key pressed
	# Returns true if we keep going
	def enter(self):
		if self.input=="":
			return True
		elif self.input=="quit":
			self.quit()
			return False
		else:
			self.input = ""


	# Change the current line to reflect self.input
	def changeline(self):
		(y,x) = self.stdscr.getyx()
		self.stdscr.deleteln()
		self.stdscr.move(y,0)
		self.prompt()
		self.stdscr.addstr(self.input)
		#self.stdscr.move(y,x+10)