stdinconsole.py

# MusicPlayer, https://github.com/albertz/music-player
# Copyright (c) 2012, Albert Zeyer, www.az2000.de
# All rights reserved.
# This code is under the 2-clause BSD license, see License.txt in the root directory of this project.

from utils import *
import sys, os

stdinQueue = OnRequestQueue()

def readNextInput():
	import appinfo
	if appinfo.args.shell:
		# if we use the shell, we cannot read from stdin here because the shell does it
		# just wait for quit
		import time
		time.sleep(1)
		return
	ch = os.read(sys.stdin.fileno(),7)
	stdinQueue.put(ch)

oldTermios = None

def setTtyNoncanonical(fd, timeout=0):
	global oldTermios
	import termios
	old = termios.tcgetattr(fd)
	if not oldTermios: oldTermios = old
	new = termios.tcgetattr(fd)
	new[3] = new[3] & ~termios.ICANON & ~termios.ECHO
	# http://www.unixguide.net/unix/programming/3.6.2.shtml
	#new[6] [termios.VMIN] = 1
	#new[6] [termios.VTIME] = 0
	new[6] [termios.VMIN] = 0 if timeout > 0 else 1
	timeout *= 10 # 10ths of second
	if timeout > 0 and timeout < 1: timeout = 1
	new[6] [termios.VTIME] = timeout

	termios.tcsetattr(fd, termios.TCSANOW, new)
	termios.tcsendbreak(fd,0)

def restoreTty(fd):
	if oldTermios:
		import termios
		termios.tcsetattr(fd, termios.TCSANOW, oldTermios)
		termios.tcsendbreak(fd, 0)


from State import state, reloadModules

def printState():
	if state.curSong:
		try:
			print os.path.basename(state.curSong.url) + " : " + \
				formatTime(state.player.curSongPos) + " / " + \
				formatTime(state.player.curSongLen)
		except:
			print "song ???"
	else:
		print "no song"

def printHelp():
	print "    h - print this help info"
	print "Enter - next song"
	print "space - play/pause"
	print " left - seek back 10 seconds"
	print "right - seek forward 10 seconds"
	print "    r - reload modules"
	print "    i - print song info"

def handleInput(ch):
	if ch == "q" or ch == "\0" or ch == "":
		print "stdin: quit"
		state.quit()
	try:
		if ch == "\x1b[D": # left
			state.player.seekRel(-10)
			printState()
		elif ch == "\x1b[C": #right
			state.player.seekRel(10)
			printState()
		elif ch == "\n": # return
			state.nextSong()
		elif ch == " ":
			state.playPause()
		elif ch == "r":
			reloadModules()
		elif ch == "i":
			printState()
		elif ch == "h":
			printHelp()
	except:
		sys.excepthook(*sys.exc_info())

def stdinconsoleMain():
	import appinfo
	if appinfo.args.shell:
		print "Setting up Python shell interface"
		# This is hacky for now but actually I don't really know a better way.
		# The problem is that the main thread might be used by the GUI.
		# Thus, we can only cancel this here via the shell itself.
		from better_exchook import debug_shell
		from queue import queue
		import utils
		shellGlobals = {
			"state": state,
			"queue": queue,
			}
		shellGlobals.update(utils.__dict__)
		debug_shell(
			shellGlobals, shellGlobals,
			execWrapper=utils.do_in_mainthread)
		print "Python shell quit."
		# The shell exited. Quit.
		state.quit()
		return
	
	fd = sys.stdin.fileno()
	if not os.isatty(fd): return # don't do anything

	# the main thread is pushing stdin updates to stdinQueue.
	setTtyNoncanonical(sys.stdin.fileno())
	print "stdin input ready"

	for ch in stdinQueue.read():
		handleInput(ch)

	restoreTty(fd)