pyTermTk/TermTk/TTkWidgets/TTkTerminal/terminal_screen_C1.py

    # MIT License
    #
    # Copyright (c) 2023 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
    #
    # Permission is hereby granted, free of charge, to any person obtaining a copy
    # of this software and associated documentation files (the "Software"), to deal
    # in the Software without restriction, including without limitation the rights
    # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    # copies of the Software, and to permit persons to whom the Software is
    # furnished to do so, subject to the following conditions:
    #
    # The above copyright notice and this permission notice shall be included in all
    # copies or substantial portions of the Software.
    #
    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    # SOFTWARE.

__all__ = ['']

import collections
import unicodedata

from TermTk.TTkCore.canvas import TTkCanvas

from TermTk.TTkCore.color import TTkColor
from TermTk.TTkCore.log import TTkLog
from TermTk.TTkCore.constant import TTkK
from TermTk.TTkCore.cfg import TTkCfg
from TermTk.TTkCore.string import TTkString
from TermTk.TTkCore.signal import pyTTkSignal, pyTTkSlot
from TermTk.TTkCore.helper import TTkHelper
from TermTk.TTkGui.clipboard import TTkClipboard
from TermTk.TTkGui.textwrap1 import TTkTextWrap
from TermTk.TTkGui.textcursor import TTkTextCursor
from TermTk.TTkGui.textdocument import TTkTextDocument
from TermTk.TTkLayouts.gridlayout import TTkGridLayout
from TermTk.TTkAbstract.abstractscrollarea import TTkAbstractScrollArea
from TermTk.TTkAbstract.abstractscrollview import TTkAbstractScrollView, TTkAbstractScrollViewGridLayout
from TermTk.TTkWidgets.widget import TTkWidget

class _TTkTerminalScreen_C1():
    # C1 (8-Bit) Control Characters
    #
    # The xterm program recognizes both 8-bit and 7-bit control characters.
    # It generates 7-bit controls (by default) or 8-bit if S8C1T is enabled.
    # The following pairs of 7-bit and 8-bit control characters are
    # equivalent:
    #
    # ESC D
    #      Index (IND  is 0x84).
    #      Move the cursor down and scroll at the edge
    def _C1_D(self):
        x,y = self._terminalCursor
        t,b = self._scrollingRegion
        h = self._h
        if y < b-1:
            self._terminalCursor = (x,y+1)
        else:
            self._CSI_S_SU(1)

    # ESC E
    #      Next Line (NEL  is 0x85).
    #
    # ESC H
    #      Tab Set (HTS  is 0x88).
    #
    # ESC M
    #      Reverse Index (RI  is 0x8d).
    #      Move the cursor Up and scroll at the edge
    def _C1_M(self):
        x,y = self._terminalCursor
        t,b = self._scrollingRegion
        h = self._h
        if y > t:
            self._terminalCursor = (x,y-1)
        else:
            self._CSI_T_SD(1)

    # ESC N
    #      Single Shift Select of G2 Character Set (SS2  is 0x8e), VT220.
    #      This affects next character only.
    #
    # ESC O
    #      Single Shift Select of G3 Character Set (SS3  is 0x8f), VT220.
    #      This affects next character only.
    #
    # ESC P
    #      Device Control String (DCS  is 0x90).
    #
    # ESC V
    #      Start of Guarded Area (SPA  is 0x96).
    #
    # ESC W
    #      End of Guarded Area (EPA  is 0x97).
    #
    # ESC X
    #      Start of String (SOS  is 0x98).
    #
    # ESC Z
    #      Return Terminal ID (DECID is 0x9a).  Obsolete form of CSI c  (DA).
    #
    # ESC [
    #      Control Sequence Introducer (CSI  is 0x9b).
    #
    # ESC \
    #      String Terminator (ST  is 0x9c).
    #
    # ESC ]
    #      Operating System Command (OSC  is 0x9d).
    #
    # ESC ^
    #      Privacy Message (PM  is 0x9e).
    #
    # ESC _
    #      Application Program Command (APC  is 0x9f).
    #
    #
    # These control characters are used in the vtXXX emulation.
    _C1_MAP = {
        'D' : _C1_D,
        'M' : _C1_M
    }