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50 lines
1.6 KiB
Python
50 lines
1.6 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 curses
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def wrapper(func, *args, **kwds):
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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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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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return func(stdscr, *args, **kwds)
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finally:
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# Set everything back to normal
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if 'stdscr' in locals():
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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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