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+"""
+Mappings from VT100 (ANSI) escape sequences to the corresponding prompt_toolkit
+keys.
+
+We are not using the terminfo/termcap databases to detect the ANSI escape
+sequences for the input. Instead, we recognize 99% of the most common
+sequences. This works well, because in practice, every modern terminal is
+mostly Xterm compatible.
+
+Some useful docs:
+- Mintty: https://github.com/mintty/mintty/blob/master/wiki/Keycodes.md
+"""
+from __future__ import annotations
+
+from ..keys import Keys
+
+__all__ = [
+ "ANSI_SEQUENCES",
+ "REVERSE_ANSI_SEQUENCES",
+]
+
+# Mapping of vt100 escape codes to Keys.
+ANSI_SEQUENCES: dict[str, Keys | tuple[Keys, ...]] = {
+ # Control keys.
+ "\x00": Keys.ControlAt, # Control-At (Also for Ctrl-Space)
+ "\x01": Keys.ControlA, # Control-A (home)
+ "\x02": Keys.ControlB, # Control-B (emacs cursor left)
+ "\x03": Keys.ControlC, # Control-C (interrupt)
+ "\x04": Keys.ControlD, # Control-D (exit)
+ "\x05": Keys.ControlE, # Control-E (end)
+ "\x06": Keys.ControlF, # Control-F (cursor forward)
+ "\x07": Keys.ControlG, # Control-G
+ "\x08": Keys.ControlH, # Control-H (8) (Identical to '\b')
+ "\x09": Keys.ControlI, # Control-I (9) (Identical to '\t')
+ "\x0a": Keys.ControlJ, # Control-J (10) (Identical to '\n')
+ "\x0b": Keys.ControlK, # Control-K (delete until end of line; vertical tab)
+ "\x0c": Keys.ControlL, # Control-L (clear; form feed)
+ "\x0d": Keys.ControlM, # Control-M (13) (Identical to '\r')
+ "\x0e": Keys.ControlN, # Control-N (14) (history forward)
+ "\x0f": Keys.ControlO, # Control-O (15)
+ "\x10": Keys.ControlP, # Control-P (16) (history back)
+ "\x11": Keys.ControlQ, # Control-Q
+ "\x12": Keys.ControlR, # Control-R (18) (reverse search)
+ "\x13": Keys.ControlS, # Control-S (19) (forward search)
+ "\x14": Keys.ControlT, # Control-T
+ "\x15": Keys.ControlU, # Control-U
+ "\x16": Keys.ControlV, # Control-V
+ "\x17": Keys.ControlW, # Control-W
+ "\x18": Keys.ControlX, # Control-X
+ "\x19": Keys.ControlY, # Control-Y (25)
+ "\x1a": Keys.ControlZ, # Control-Z
+ "\x1b": Keys.Escape, # Also Control-[
+ "\x9b": Keys.ShiftEscape,
+ "\x1c": Keys.ControlBackslash, # Both Control-\ (also Ctrl-| )
+ "\x1d": Keys.ControlSquareClose, # Control-]
+ "\x1e": Keys.ControlCircumflex, # Control-^
+ "\x1f": Keys.ControlUnderscore, # Control-underscore (Also for Ctrl-hyphen.)
+ # ASCII Delete (0x7f)
+ # Vt220 (and Linux terminal) send this when pressing backspace. We map this
+ # to ControlH, because that will make it easier to create key bindings that
+ # work everywhere, with the trade-off that it's no longer possible to
+ # handle backspace and control-h individually for the few terminals that
+ # support it. (Most terminals send ControlH when backspace is pressed.)
+ # See: http://www.ibb.net/~anne/keyboard.html
+ "\x7f": Keys.ControlH,
+ # --
+ # Various
+ "\x1b[1~": Keys.Home, # tmux
+ "\x1b[2~": Keys.Insert,
+ "\x1b[3~": Keys.Delete,
+ "\x1b[4~": Keys.End, # tmux
+ "\x1b[5~": Keys.PageUp,
+ "\x1b[6~": Keys.PageDown,
+ "\x1b[7~": Keys.Home, # xrvt
+ "\x1b[8~": Keys.End, # xrvt
+ "\x1b[Z": Keys.BackTab, # shift + tab
+ "\x1b\x09": Keys.BackTab, # Linux console
+ "\x1b[~": Keys.BackTab, # Windows console
+ # --
+ # Function keys.
+ "\x1bOP": Keys.F1,
+ "\x1bOQ": Keys.F2,
+ "\x1bOR": Keys.F3,
+ "\x1bOS": Keys.F4,
+ "\x1b[[A": Keys.F1, # Linux console.
+ "\x1b[[B": Keys.F2, # Linux console.
+ "\x1b[[C": Keys.F3, # Linux console.
+ "\x1b[[D": Keys.F4, # Linux console.
+ "\x1b[[E": Keys.F5, # Linux console.
+ "\x1b[11~": Keys.F1, # rxvt-unicode
+ "\x1b[12~": Keys.F2, # rxvt-unicode
+ "\x1b[13~": Keys.F3, # rxvt-unicode
+ "\x1b[14~": Keys.F4, # rxvt-unicode
+ "\x1b[15~": Keys.F5,
+ "\x1b[17~": Keys.F6,
+ "\x1b[18~": Keys.F7,
+ "\x1b[19~": Keys.F8,
+ "\x1b[20~": Keys.F9,
+ "\x1b[21~": Keys.F10,
+ "\x1b[23~": Keys.F11,
+ "\x1b[24~": Keys.F12,
+ "\x1b[25~": Keys.F13,
+ "\x1b[26~": Keys.F14,
+ "\x1b[28~": Keys.F15,
+ "\x1b[29~": Keys.F16,
+ "\x1b[31~": Keys.F17,
+ "\x1b[32~": Keys.F18,
+ "\x1b[33~": Keys.F19,
+ "\x1b[34~": Keys.F20,
+ # Xterm
+ "\x1b[1;2P": Keys.F13,
+ "\x1b[1;2Q": Keys.F14,
+ # '\x1b[1;2R': Keys.F15, # Conflicts with CPR response.
+ "\x1b[1;2S": Keys.F16,
+ "\x1b[15;2~": Keys.F17,
+ "\x1b[17;2~": Keys.F18,
+ "\x1b[18;2~": Keys.F19,
+ "\x1b[19;2~": Keys.F20,
+ "\x1b[20;2~": Keys.F21,
+ "\x1b[21;2~": Keys.F22,
+ "\x1b[23;2~": Keys.F23,
+ "\x1b[24;2~": Keys.F24,
+ # --
+ # CSI 27 disambiguated modified "other" keys (xterm)
+ # Ref: https://invisible-island.net/xterm/modified-keys.html
+ # These are currently unsupported, so just re-map some common ones to the
+ # unmodified versions
+ "\x1b[27;2;13~": Keys.ControlM, # Shift + Enter
+ "\x1b[27;5;13~": Keys.ControlM, # Ctrl + Enter
+ "\x1b[27;6;13~": Keys.ControlM, # Ctrl + Shift + Enter
+ # --
+ # Control + function keys.
+ "\x1b[1;5P": Keys.ControlF1,
+ "\x1b[1;5Q": Keys.ControlF2,
+ # "\x1b[1;5R": Keys.ControlF3, # Conflicts with CPR response.
+ "\x1b[1;5S": Keys.ControlF4,
+ "\x1b[15;5~": Keys.ControlF5,
+ "\x1b[17;5~": Keys.ControlF6,
+ "\x1b[18;5~": Keys.ControlF7,
+ "\x1b[19;5~": Keys.ControlF8,
+ "\x1b[20;5~": Keys.ControlF9,
+ "\x1b[21;5~": Keys.ControlF10,
+ "\x1b[23;5~": Keys.ControlF11,
+ "\x1b[24;5~": Keys.ControlF12,
+ "\x1b[1;6P": Keys.ControlF13,
+ "\x1b[1;6Q": Keys.ControlF14,
+ # "\x1b[1;6R": Keys.ControlF15, # Conflicts with CPR response.
+ "\x1b[1;6S": Keys.ControlF16,
+ "\x1b[15;6~": Keys.ControlF17,
+ "\x1b[17;6~": Keys.ControlF18,
+ "\x1b[18;6~": Keys.ControlF19,
+ "\x1b[19;6~": Keys.ControlF20,
+ "\x1b[20;6~": Keys.ControlF21,
+ "\x1b[21;6~": Keys.ControlF22,
+ "\x1b[23;6~": Keys.ControlF23,
+ "\x1b[24;6~": Keys.ControlF24,
+ # --
+ # Tmux (Win32 subsystem) sends the following scroll events.
+ "\x1b[62~": Keys.ScrollUp,
+ "\x1b[63~": Keys.ScrollDown,
+ "\x1b[200~": Keys.BracketedPaste, # Start of bracketed paste.
+ # --
+ # Sequences generated by numpad 5. Not sure what it means. (It doesn't
+ # appear in 'infocmp'. Just ignore.
+ "\x1b[E": Keys.Ignore, # Xterm.
+ "\x1b[G": Keys.Ignore, # Linux console.
+ # --
+ # Meta/control/escape + pageup/pagedown/insert/delete.
+ "\x1b[3;2~": Keys.ShiftDelete, # xterm, gnome-terminal.
+ "\x1b[5;2~": Keys.ShiftPageUp,
+ "\x1b[6;2~": Keys.ShiftPageDown,
+ "\x1b[2;3~": (Keys.Escape, Keys.Insert),
+ "\x1b[3;3~": (Keys.Escape, Keys.Delete),
+ "\x1b[5;3~": (Keys.Escape, Keys.PageUp),
+ "\x1b[6;3~": (Keys.Escape, Keys.PageDown),
+ "\x1b[2;4~": (Keys.Escape, Keys.ShiftInsert),
+ "\x1b[3;4~": (Keys.Escape, Keys.ShiftDelete),
+ "\x1b[5;4~": (Keys.Escape, Keys.ShiftPageUp),
+ "\x1b[6;4~": (Keys.Escape, Keys.ShiftPageDown),
+ "\x1b[3;5~": Keys.ControlDelete, # xterm, gnome-terminal.
+ "\x1b[5;5~": Keys.ControlPageUp,
+ "\x1b[6;5~": Keys.ControlPageDown,
+ "\x1b[3;6~": Keys.ControlShiftDelete,
+ "\x1b[5;6~": Keys.ControlShiftPageUp,
+ "\x1b[6;6~": Keys.ControlShiftPageDown,
+ "\x1b[2;7~": (Keys.Escape, Keys.ControlInsert),
+ "\x1b[5;7~": (Keys.Escape, Keys.ControlPageDown),
+ "\x1b[6;7~": (Keys.Escape, Keys.ControlPageDown),
+ "\x1b[2;8~": (Keys.Escape, Keys.ControlShiftInsert),
+ "\x1b[5;8~": (Keys.Escape, Keys.ControlShiftPageDown),
+ "\x1b[6;8~": (Keys.Escape, Keys.ControlShiftPageDown),
+ # --
+ # Arrows.
+ # (Normal cursor mode).
+ "\x1b[A": Keys.Up,
+ "\x1b[B": Keys.Down,
+ "\x1b[C": Keys.Right,
+ "\x1b[D": Keys.Left,
+ "\x1b[H": Keys.Home,
+ "\x1b[F": Keys.End,
+ # Tmux sends following keystrokes when control+arrow is pressed, but for
+ # Emacs ansi-term sends the same sequences for normal arrow keys. Consider
+ # it a normal arrow press, because that's more important.
+ # (Application cursor mode).
+ "\x1bOA": Keys.Up,
+ "\x1bOB": Keys.Down,
+ "\x1bOC": Keys.Right,
+ "\x1bOD": Keys.Left,
+ "\x1bOF": Keys.End,
+ "\x1bOH": Keys.Home,
+ # Shift + arrows.
+ "\x1b[1;2A": Keys.ShiftUp,
+ "\x1b[1;2B": Keys.ShiftDown,
+ "\x1b[1;2C": Keys.ShiftRight,
+ "\x1b[1;2D": Keys.ShiftLeft,
+ "\x1b[1;2F": Keys.ShiftEnd,
+ "\x1b[1;2H": Keys.ShiftHome,
+ # Meta + arrow keys. Several terminals handle this differently.
+ # The following sequences are for xterm and gnome-terminal.
+ # (Iterm sends ESC followed by the normal arrow_up/down/left/right
+ # sequences, and the OSX Terminal sends ESCb and ESCf for "alt
+ # arrow_left" and "alt arrow_right." We don't handle these
+ # explicitly, in here, because would could not distinguish between
+ # pressing ESC (to go to Vi navigation mode), followed by just the
+ # 'b' or 'f' key. These combinations are handled in
+ # the input processor.)
+ "\x1b[1;3A": (Keys.Escape, Keys.Up),
+ "\x1b[1;3B": (Keys.Escape, Keys.Down),
+ "\x1b[1;3C": (Keys.Escape, Keys.Right),
+ "\x1b[1;3D": (Keys.Escape, Keys.Left),
+ "\x1b[1;3F": (Keys.Escape, Keys.End),
+ "\x1b[1;3H": (Keys.Escape, Keys.Home),
+ # Alt+shift+number.
+ "\x1b[1;4A": (Keys.Escape, Keys.ShiftDown),
+ "\x1b[1;4B": (Keys.Escape, Keys.ShiftUp),
+ "\x1b[1;4C": (Keys.Escape, Keys.ShiftRight),
+ "\x1b[1;4D": (Keys.Escape, Keys.ShiftLeft),
+ "\x1b[1;4F": (Keys.Escape, Keys.ShiftEnd),
+ "\x1b[1;4H": (Keys.Escape, Keys.ShiftHome),
+ # Control + arrows.
+ "\x1b[1;5A": Keys.ControlUp, # Cursor Mode
+ "\x1b[1;5B": Keys.ControlDown, # Cursor Mode
+ "\x1b[1;5C": Keys.ControlRight, # Cursor Mode
+ "\x1b[1;5D": Keys.ControlLeft, # Cursor Mode
+ "\x1b[1;5F": Keys.ControlEnd,
+ "\x1b[1;5H": Keys.ControlHome,
+ # Tmux sends following keystrokes when control+arrow is pressed, but for
+ # Emacs ansi-term sends the same sequences for normal arrow keys. Consider
+ # it a normal arrow press, because that's more important.
+ "\x1b[5A": Keys.ControlUp,
+ "\x1b[5B": Keys.ControlDown,
+ "\x1b[5C": Keys.ControlRight,
+ "\x1b[5D": Keys.ControlLeft,
+ "\x1bOc": Keys.ControlRight, # rxvt
+ "\x1bOd": Keys.ControlLeft, # rxvt
+ # Control + shift + arrows.
+ "\x1b[1;6A": Keys.ControlShiftDown,
+ "\x1b[1;6B": Keys.ControlShiftUp,
+ "\x1b[1;6C": Keys.ControlShiftRight,
+ "\x1b[1;6D": Keys.ControlShiftLeft,
+ "\x1b[1;6F": Keys.ControlShiftEnd,
+ "\x1b[1;6H": Keys.ControlShiftHome,
+ # Control + Meta + arrows.
+ "\x1b[1;7A": (Keys.Escape, Keys.ControlDown),
+ "\x1b[1;7B": (Keys.Escape, Keys.ControlUp),
+ "\x1b[1;7C": (Keys.Escape, Keys.ControlRight),
+ "\x1b[1;7D": (Keys.Escape, Keys.ControlLeft),
+ "\x1b[1;7F": (Keys.Escape, Keys.ControlEnd),
+ "\x1b[1;7H": (Keys.Escape, Keys.ControlHome),
+ # Meta + Shift + arrows.
+ "\x1b[1;8A": (Keys.Escape, Keys.ControlShiftDown),
+ "\x1b[1;8B": (Keys.Escape, Keys.ControlShiftUp),
+ "\x1b[1;8C": (Keys.Escape, Keys.ControlShiftRight),
+ "\x1b[1;8D": (Keys.Escape, Keys.ControlShiftLeft),
+ "\x1b[1;8F": (Keys.Escape, Keys.ControlShiftEnd),
+ "\x1b[1;8H": (Keys.Escape, Keys.ControlShiftHome),
+ # Meta + arrow on (some?) Macs when using iTerm defaults (see issue #483).
+ "\x1b[1;9A": (Keys.Escape, Keys.Up),
+ "\x1b[1;9B": (Keys.Escape, Keys.Down),
+ "\x1b[1;9C": (Keys.Escape, Keys.Right),
+ "\x1b[1;9D": (Keys.Escape, Keys.Left),
+ # --
+ # Control/shift/meta + number in mintty.
+ # (c-2 will actually send c-@ and c-6 will send c-^.)
+ "\x1b[1;5p": Keys.Control0,
+ "\x1b[1;5q": Keys.Control1,
+ "\x1b[1;5r": Keys.Control2,
+ "\x1b[1;5s": Keys.Control3,
+ "\x1b[1;5t": Keys.Control4,
+ "\x1b[1;5u": Keys.Control5,
+ "\x1b[1;5v": Keys.Control6,
+ "\x1b[1;5w": Keys.Control7,
+ "\x1b[1;5x": Keys.Control8,
+ "\x1b[1;5y": Keys.Control9,
+ "\x1b[1;6p": Keys.ControlShift0,
+ "\x1b[1;6q": Keys.ControlShift1,
+ "\x1b[1;6r": Keys.ControlShift2,
+ "\x1b[1;6s": Keys.ControlShift3,
+ "\x1b[1;6t": Keys.ControlShift4,
+ "\x1b[1;6u": Keys.ControlShift5,
+ "\x1b[1;6v": Keys.ControlShift6,
+ "\x1b[1;6w": Keys.ControlShift7,
+ "\x1b[1;6x": Keys.ControlShift8,
+ "\x1b[1;6y": Keys.ControlShift9,
+ "\x1b[1;7p": (Keys.Escape, Keys.Control0),
+ "\x1b[1;7q": (Keys.Escape, Keys.Control1),
+ "\x1b[1;7r": (Keys.Escape, Keys.Control2),
+ "\x1b[1;7s": (Keys.Escape, Keys.Control3),
+ "\x1b[1;7t": (Keys.Escape, Keys.Control4),
+ "\x1b[1;7u": (Keys.Escape, Keys.Control5),
+ "\x1b[1;7v": (Keys.Escape, Keys.Control6),
+ "\x1b[1;7w": (Keys.Escape, Keys.Control7),
+ "\x1b[1;7x": (Keys.Escape, Keys.Control8),
+ "\x1b[1;7y": (Keys.Escape, Keys.Control9),
+ "\x1b[1;8p": (Keys.Escape, Keys.ControlShift0),
+ "\x1b[1;8q": (Keys.Escape, Keys.ControlShift1),
+ "\x1b[1;8r": (Keys.Escape, Keys.ControlShift2),
+ "\x1b[1;8s": (Keys.Escape, Keys.ControlShift3),
+ "\x1b[1;8t": (Keys.Escape, Keys.ControlShift4),
+ "\x1b[1;8u": (Keys.Escape, Keys.ControlShift5),
+ "\x1b[1;8v": (Keys.Escape, Keys.ControlShift6),
+ "\x1b[1;8w": (Keys.Escape, Keys.ControlShift7),
+ "\x1b[1;8x": (Keys.Escape, Keys.ControlShift8),
+ "\x1b[1;8y": (Keys.Escape, Keys.ControlShift9),
+}
+
+
+def _get_reverse_ansi_sequences() -> dict[Keys, str]:
+ """
+ Create a dictionary that maps prompt_toolkit keys back to the VT100 escape
+ sequences.
+ """
+ result: dict[Keys, str] = {}
+
+ for sequence, key in ANSI_SEQUENCES.items():
+ if not isinstance(key, tuple):
+ if key not in result:
+ result[key] = sequence
+
+ return result
+
+
+REVERSE_ANSI_SEQUENCES = _get_reverse_ansi_sequences()