def open()

in ebcli/bundled/asciimatics/screen.py [0:0]
55 lines of code
10 McCabe index (conditional complexity)

    def open(cls, height=200, catch_interrupt=False, unicode_aware=None):
        """
        Construct a new Screen for any platform.  This will just create the
        correct Screen object for your environment.  See :py:meth:`.wrapper` for
        a function to create and tidy up once you've finished with the Screen.

        :param height: The buffer height for this window (if using scrolling).
        :param catch_interrupt: Whether to catch and prevent keyboard
            interrupts.  Defaults to False to maintain backwards compatibility.
        :param unicode_aware: Whether the application can use unicode or not.
            If None, try to detect from the environment if UTF-8 is enabled.
        """
        if sys.platform == "win32":
            # Clone the standard output buffer so that we can do whatever we
            # need for the application, but restore the buffer at the end.
            # Note that we need to resize the clone to ensure that it is the
            # same size as the original in some versions of Windows.
            old_out = win32console.PyConsoleScreenBufferType(
                win32file.CreateFile("CONOUT$",
                                     win32file.GENERIC_READ | win32file.GENERIC_WRITE,
                                     win32file.FILE_SHARE_WRITE,
                                     None,
                                     win32file.OPEN_ALWAYS,
                                     0,
                                     None))
            try:
                info = old_out.GetConsoleScreenBufferInfo()
            except pywintypes.error:
                info = None
            win_out = win32console.CreateConsoleScreenBuffer()
            if info:
                win_out.SetConsoleScreenBufferSize(info['Size'])
            else:
                win_out.SetStdHandle(win32console.STD_OUTPUT_HANDLE)
            win_out.SetConsoleActiveScreenBuffer()

            # Get the standard input buffer.
            win_in = win32console.PyConsoleScreenBufferType(
                win32file.CreateFile("CONIN$",
                                     win32file.GENERIC_READ | win32file.GENERIC_WRITE,
                                     win32file.FILE_SHARE_READ,
                                     None,
                                     win32file.OPEN_ALWAYS,
                                     0,
                                     None))
            win_in.SetStdHandle(win32console.STD_INPUT_HANDLE)

            # Hide the cursor.
            win_out.SetConsoleCursorInfo(1, 0)

            # Disable scrolling
            out_mode = win_out.GetConsoleMode()
            win_out.SetConsoleMode(
                out_mode & ~ win32console.ENABLE_WRAP_AT_EOL_OUTPUT)

            # Enable mouse input, disable quick-edit mode and disable ctrl-c
            # if needed.
            in_mode = win_in.GetConsoleMode()
            new_mode = (in_mode | win32console.ENABLE_MOUSE_INPUT |
                        ENABLE_EXTENDED_FLAGS)
            new_mode &= ~ENABLE_QUICK_EDIT_MODE
            if catch_interrupt:
                # Ignore ctrl-c handlers if specified.
                new_mode &= ~win32console.ENABLE_PROCESSED_INPUT
            win_in.SetConsoleMode(new_mode)

            screen = _WindowsScreen(win_out, win_in, height, old_out, in_mode,
                                    unicode_aware=unicode_aware)
        else:
            # Reproduce curses.wrapper()
            stdscr = curses.initscr()
            curses.noecho()
            curses.cbreak()
            stdscr.keypad(1)

            # Fed up with linters complaining about original curses code - trying to be a bit better...
            # noinspection PyBroadException
            # pylint: disable=broad-except
            try:
                curses.start_color()
            except Exception as e:
                logger.debug(e)
            screen = _CursesScreen(stdscr, height,
                                   catch_interrupt=catch_interrupt,
                                   unicode_aware=unicode_aware)

        return screen