#!/usr/bin/env python
"""
emano.py - The Simple Powerful Term Editor
Author: Sean B. Palmer, inamidst.com
Source: http://inamidst.com/emano/

@@ WARNING: This is not yet stable code: 
 * Don't edit any files that you consider valuable
 * Remember to back up all of your work first
"""

import sys, os, curses

# @@ Version: major.months-since-2005-01.day?

if hasattr(os, 'pathconf_names'): 
   # A value of -1 is returned if any of _POSIX_CHOWN_RESTRICTED, _
   # POSIX_NO_TRUNC and _POSIX_VDISABLE are turned off. Otherwise,
   # another value is returned.
   # --man pathconf(2)
   # 
   # This option is only meaningful for files that are terminal 
   # devices. If it is enabled, then handling for special control 
   # characters can be disabled individually.
   # --GNU libc manual on _POSIX_VDISABLE
   _POSIX_VDISABLE = os.pathconf_names.get('PC_VDISABLE', -1) != -1
else: _POSIX_VDISABLE = False

def start(*filenames): 
   """Initialise ncurses and start an emano Editor instance."""
   screen = curses.initscr()
   screen.border(' ', ' ', ' ', ' ', ' ', ' ', ord('#'))
   screen.keypad(0)

   curses.nonl() # Turn off input buffering
   curses.noecho() # Turn off input echoing
   if _POSIX_VDISABLE: # And, if this system supports this...
      curses.raw() # Turn off everything else

   curses.meta(1) # Allow 8-bit character input

   def restore(): 
      """Reverse the ncurses setup stuff."""
      curses.nl()
      curses.echo()
      if _POSIX_VDISABLE: 
         curses.noraw()
      curses.endwin()

   # @@ Wrap this is a better try-etc. block
   import editor
   try: editor.run(screen, filenames)
   finally: restore()

def main(argv=None): 
   # Check that we're in Python 2.4 or later
   if (not hasattr(sys, 'version_info')) or sys.version_info < (2, 4): 
      print >> sys.stderr, "Error: Requires Python 2.4 or later."
      sys.exit(1)

   from optparse import OptionParser
   parser = OptionParser(usage='%prog [options] <filename>*')
   options, args = parser.parse_args(argv)
   start(*args)

if __name__=="__main__": 
   main()