# -*- coding: utf-8 -*-
"""
    pyte.modes
    ~~~~~~~~~~

    This module defines terminal mode switches, used by
    :class:`~pyte.screens.Screen`. There're two types of terminal modes:

    * `non-private` which should be set with ``ESC [ N h``, where ``N``
      is an integer, representing mode being set; and
    * `private` which should be set with ``ESC [ ? N h``.

    The latter are shifted 5 times to the right, to be easily
    distinguishable from the former ones; for example `Origin Mode`
    -- :data:`DECOM` is ``192`` not ``6``.

    >>> DECOM
    192

    :copyright: (c) 2011-2013 by Selectel, see AUTHORS for details.
    :license: LGPL, see LICENSE for more details.
"""

#: *Line Feed/New Line Mode*: When enabled, causes a received
#: :data:`~pyte.control.LF`, :data:`pyte.control.FF`, or
#: :data:`~pyte.control.VT` to move the cursor to the first column of
#: the next line.
LNM = 20

#: *Insert/Replace Mode*: When enabled, new display characters move
#: old display characters to the right. Characters moved past the
#: right margin are lost. Otherwise, new display characters replace
#: old display characters at the cursor position.
IRM = 4


# Private modes.
# ..............

#: *Text Cursor Enable Mode*: determines if the text cursor is
#: visible.
DECTCEM = 25 << 5

#: *Screen Mode*: toggles screen-wide reverse-video mode.
DECSCNM = 5 << 5

#: *Origin Mode*: allows cursor addressing relative to a user-defined
#: origin. This mode resets when the terminal is powered up or reset.
#: It does not affect the erase in display (ED) function.
DECOM = 6 << 5

#: *Auto Wrap Mode*: selects where received graphic characters appear
#: when the cursor is at the right margin.
DECAWM = 7 << 5

#: *Column Mode*: selects the number of columns per line (80 or 132)
#: on the screen.
DECCOLM = 3 << 5
