64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
"""curses.wrapper
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Contains one function, wrapper(), which runs another function which
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should be the rest of your curses-based application. If the
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application raises an exception, wrapper() will restore the terminal
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to a sane state so you can read the resulting traceback.
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"""
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import sys, curses
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def wrapper(func, *rest):
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"""Wrapper function that initializes curses and calls another function,
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restoring normal keyboard/screen behavior on error.
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The callable object 'func' is then passed the main window 'stdscr'
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as its first argument, followed by any other arguments passed to
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wrapper().
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"""
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res = None
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try:
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# Initialize curses
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stdscr=curses.initscr()
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# Turn off echoing of keys, and enter cbreak mode,
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# where no buffering is performed on keyboard input
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curses.noecho()
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curses.cbreak()
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# In keypad mode, escape sequences for special keys
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# (like the cursor keys) will be interpreted and
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# a special value like curses.KEY_LEFT will be returned
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stdscr.keypad(1)
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# Start color, too. Harmless if the terminal doesn't have
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# color; user can test with has_color() later on. The try/catch
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# works around a minor bit of over-conscientiousness in the curses
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# module -- the error return from C start_color() is ignorable.
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try:
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curses.start_color()
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except:
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pass
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res = apply(func, (stdscr,) + rest)
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except:
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# In the event of an error, restore the terminal
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# to a sane state.
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stdscr.keypad(0)
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curses.echo()
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curses.nocbreak()
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curses.endwin()
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# Pass the exception upwards
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(exc_type, exc_value, exc_traceback) = sys.exc_info()
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raise exc_type, exc_value, exc_traceback
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else:
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# Set everything back to normal
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stdscr.keypad(0)
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curses.echo()
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curses.nocbreak()
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curses.endwin() # Terminate curses
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return res
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