mirror of https://github.com/python/cpython
788 lines
28 KiB
Python
788 lines
28 KiB
Python
# Copyright 2000-2010 Michael Hudson-Doyle <micahel@gmail.com>
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# Antonio Cuni
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# Armin Rigo
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#
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# All Rights Reserved
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#
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#
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# Permission to use, copy, modify, and distribute this software and
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# its documentation for any purpose is hereby granted without fee,
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# provided that the above copyright notice appear in all copies and
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# that both that copyright notice and this permission notice appear in
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# supporting documentation.
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#
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# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
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# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
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# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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from __future__ import annotations
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from contextlib import contextmanager
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from dataclasses import dataclass, field, fields
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import unicodedata
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from _colorize import can_colorize, ANSIColors # type: ignore[import-not-found]
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from . import commands, console, input
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from .utils import ANSI_ESCAPE_SEQUENCE, wlen, str_width
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from .trace import trace
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# types
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Command = commands.Command
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if False:
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from .types import Callback, SimpleContextManager, KeySpec, CommandName
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def disp_str(buffer: str) -> tuple[str, list[int]]:
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"""disp_str(buffer:string) -> (string, [int])
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Return the string that should be the printed representation of
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|buffer| and a list detailing where the characters of |buffer|
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get used up. E.g.:
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>>> disp_str(chr(3))
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('^C', [1, 0])
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"""
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b: list[int] = []
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s: list[str] = []
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for c in buffer:
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if ord(c) < 128:
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s.append(c)
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b.append(1)
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elif unicodedata.category(c).startswith("C"):
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c = r"\u%04x" % ord(c)
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s.append(c)
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b.extend([0] * (len(c) - 1))
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else:
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s.append(c)
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b.append(str_width(c))
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return "".join(s), b
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# syntax classes:
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SYNTAX_WHITESPACE, SYNTAX_WORD, SYNTAX_SYMBOL = range(3)
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def make_default_syntax_table() -> dict[str, int]:
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# XXX perhaps should use some unicodedata here?
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st: dict[str, int] = {}
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for c in map(chr, range(256)):
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st[c] = SYNTAX_SYMBOL
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for c in [a for a in map(chr, range(256)) if a.isalnum()]:
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st[c] = SYNTAX_WORD
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st["\n"] = st[" "] = SYNTAX_WHITESPACE
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return st
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def make_default_commands() -> dict[CommandName, type[Command]]:
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result: dict[CommandName, type[Command]] = {}
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for v in vars(commands).values():
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if isinstance(v, type) and issubclass(v, Command) and v.__name__[0].islower():
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result[v.__name__] = v
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result[v.__name__.replace("_", "-")] = v
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return result
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default_keymap: tuple[tuple[KeySpec, CommandName], ...] = tuple(
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[
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(r"\C-a", "beginning-of-line"),
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(r"\C-b", "left"),
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(r"\C-c", "interrupt"),
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(r"\C-d", "delete"),
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(r"\C-e", "end-of-line"),
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(r"\C-f", "right"),
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(r"\C-g", "cancel"),
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(r"\C-h", "backspace"),
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(r"\C-j", "accept"),
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(r"\<return>", "accept"),
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(r"\C-k", "kill-line"),
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(r"\C-l", "clear-screen"),
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(r"\C-m", "accept"),
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(r"\C-t", "transpose-characters"),
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(r"\C-u", "unix-line-discard"),
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(r"\C-w", "unix-word-rubout"),
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(r"\C-x\C-u", "upcase-region"),
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(r"\C-y", "yank"),
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(r"\C-z", "suspend"),
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(r"\M-b", "backward-word"),
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(r"\M-c", "capitalize-word"),
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(r"\M-d", "kill-word"),
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(r"\M-f", "forward-word"),
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(r"\M-l", "downcase-word"),
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(r"\M-t", "transpose-words"),
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(r"\M-u", "upcase-word"),
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(r"\M-y", "yank-pop"),
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(r"\M--", "digit-arg"),
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(r"\M-0", "digit-arg"),
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(r"\M-1", "digit-arg"),
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(r"\M-2", "digit-arg"),
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(r"\M-3", "digit-arg"),
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(r"\M-4", "digit-arg"),
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(r"\M-5", "digit-arg"),
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(r"\M-6", "digit-arg"),
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(r"\M-7", "digit-arg"),
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(r"\M-8", "digit-arg"),
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(r"\M-9", "digit-arg"),
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(r"\M-\n", "accept"),
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("\\\\", "self-insert"),
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(r"\x1b[200~", "enable_bracketed_paste"),
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(r"\x1b[201~", "disable_bracketed_paste"),
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(r"\x03", "ctrl-c"),
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]
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+ [(c, "self-insert") for c in map(chr, range(32, 127)) if c != "\\"]
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+ [(c, "self-insert") for c in map(chr, range(128, 256)) if c.isalpha()]
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+ [
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(r"\<up>", "up"),
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(r"\<down>", "down"),
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(r"\<left>", "left"),
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(r"\C-\<left>", "backward-word"),
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(r"\<right>", "right"),
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(r"\C-\<right>", "forward-word"),
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(r"\<delete>", "delete"),
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(r"\<backspace>", "backspace"),
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(r"\M-\<backspace>", "backward-kill-word"),
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(r"\<end>", "end-of-line"), # was 'end'
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(r"\<home>", "beginning-of-line"), # was 'home'
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(r"\<f1>", "help"),
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(r"\<f2>", "show-history"),
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(r"\<f3>", "paste-mode"),
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(r"\EOF", "end"), # the entries in the terminfo database for xterms
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(r"\EOH", "home"), # seem to be wrong. this is a less than ideal
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# workaround
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]
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)
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@dataclass(slots=True)
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class Reader:
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"""The Reader class implements the bare bones of a command reader,
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handling such details as editing and cursor motion. What it does
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not support are such things as completion or history support -
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these are implemented elsewhere.
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Instance variables of note include:
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* buffer:
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A *list* (*not* a string at the moment :-) containing all the
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characters that have been entered.
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* console:
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Hopefully encapsulates the OS dependent stuff.
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* pos:
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A 0-based index into 'buffer' for where the insertion point
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is.
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* screeninfo:
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Ahem. This list contains some info needed to move the
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insertion point around reasonably efficiently.
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* cxy, lxy:
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the position of the insertion point in screen ...
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* syntax_table:
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Dictionary mapping characters to 'syntax class'; read the
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emacs docs to see what this means :-)
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* commands:
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Dictionary mapping command names to command classes.
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* arg:
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The emacs-style prefix argument. It will be None if no such
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argument has been provided.
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* dirty:
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True if we need to refresh the display.
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* kill_ring:
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The emacs-style kill-ring; manipulated with yank & yank-pop
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* ps1, ps2, ps3, ps4:
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prompts. ps1 is the prompt for a one-line input; for a
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multiline input it looks like:
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ps2> first line of input goes here
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ps3> second and further
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ps3> lines get ps3
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...
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ps4> and the last one gets ps4
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As with the usual top-level, you can set these to instances if
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you like; str() will be called on them (once) at the beginning
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of each command. Don't put really long or newline containing
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strings here, please!
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This is just the default policy; you can change it freely by
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overriding get_prompt() (and indeed some standard subclasses
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do).
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* finished:
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handle1 will set this to a true value if a command signals
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that we're done.
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"""
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console: console.Console
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## state
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buffer: list[str] = field(default_factory=list)
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pos: int = 0
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ps1: str = "->> "
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ps2: str = "/>> "
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ps3: str = "|.. "
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ps4: str = R"\__ "
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kill_ring: list[list[str]] = field(default_factory=list)
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msg: str = ""
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arg: int | None = None
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dirty: bool = False
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finished: bool = False
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paste_mode: bool = False
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in_bracketed_paste: bool = False
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commands: dict[str, type[Command]] = field(default_factory=make_default_commands)
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last_command: type[Command] | None = None
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syntax_table: dict[str, int] = field(default_factory=make_default_syntax_table)
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keymap: tuple[tuple[str, str], ...] = ()
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input_trans: input.KeymapTranslator = field(init=False)
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input_trans_stack: list[input.KeymapTranslator] = field(default_factory=list)
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screen: list[str] = field(default_factory=list)
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screeninfo: list[tuple[int, list[int]]] = field(init=False)
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cxy: tuple[int, int] = field(init=False)
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lxy: tuple[int, int] = field(init=False)
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scheduled_commands: list[str] = field(default_factory=list)
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can_colorize: bool = False
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## cached metadata to speed up screen refreshes
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@dataclass
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class RefreshCache:
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in_bracketed_paste: bool = False
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screen: list[str] = field(default_factory=list)
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screeninfo: list[tuple[int, list[int]]] = field(init=False)
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line_end_offsets: list[int] = field(default_factory=list)
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pos: int = field(init=False)
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cxy: tuple[int, int] = field(init=False)
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dimensions: tuple[int, int] = field(init=False)
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invalidated: bool = False
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def update_cache(self,
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reader: Reader,
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screen: list[str],
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screeninfo: list[tuple[int, list[int]]],
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) -> None:
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self.in_bracketed_paste = reader.in_bracketed_paste
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self.screen = screen.copy()
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self.screeninfo = screeninfo.copy()
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self.pos = reader.pos
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self.cxy = reader.cxy
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self.dimensions = reader.console.width, reader.console.height
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self.invalidated = False
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def valid(self, reader: Reader) -> bool:
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if self.invalidated:
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return False
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dimensions = reader.console.width, reader.console.height
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dimensions_changed = dimensions != self.dimensions
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paste_changed = reader.in_bracketed_paste != self.in_bracketed_paste
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return not (dimensions_changed or paste_changed)
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def get_cached_location(self, reader: Reader) -> tuple[int, int]:
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if self.invalidated:
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raise ValueError("Cache is invalidated")
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offset = 0
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earliest_common_pos = min(reader.pos, self.pos)
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num_common_lines = len(self.line_end_offsets)
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while num_common_lines > 0:
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offset = self.line_end_offsets[num_common_lines - 1]
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if earliest_common_pos > offset:
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break
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num_common_lines -= 1
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else:
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offset = 0
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return offset, num_common_lines
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last_refresh_cache: RefreshCache = field(default_factory=RefreshCache)
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def __post_init__(self) -> None:
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# Enable the use of `insert` without a `prepare` call - necessary to
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# facilitate the tab completion hack implemented for
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# <https://bugs.python.org/issue25660>.
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self.keymap = self.collect_keymap()
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self.input_trans = input.KeymapTranslator(
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self.keymap, invalid_cls="invalid-key", character_cls="self-insert"
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)
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self.screeninfo = [(0, [])]
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self.cxy = self.pos2xy()
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self.lxy = (self.pos, 0)
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self.can_colorize = can_colorize()
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self.last_refresh_cache.screeninfo = self.screeninfo
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self.last_refresh_cache.pos = self.pos
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self.last_refresh_cache.cxy = self.cxy
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self.last_refresh_cache.dimensions = (0, 0)
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def collect_keymap(self) -> tuple[tuple[KeySpec, CommandName], ...]:
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return default_keymap
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def calc_screen(self) -> list[str]:
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"""Translate changes in self.buffer into changes in self.console.screen."""
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# Since the last call to calc_screen:
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# screen and screeninfo may differ due to a completion menu being shown
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# pos and cxy may differ due to edits, cursor movements, or completion menus
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# Lines that are above both the old and new cursor position can't have changed,
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# unless the terminal has been resized (which might cause reflowing) or we've
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# entered or left paste mode (which changes prompts, causing reflowing).
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num_common_lines = 0
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offset = 0
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if self.last_refresh_cache.valid(self):
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offset, num_common_lines = self.last_refresh_cache.get_cached_location(self)
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screen = self.last_refresh_cache.screen
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del screen[num_common_lines:]
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screeninfo = self.last_refresh_cache.screeninfo
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del screeninfo[num_common_lines:]
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last_refresh_line_end_offsets = self.last_refresh_cache.line_end_offsets
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del last_refresh_line_end_offsets[num_common_lines:]
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pos = self.pos
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pos -= offset
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lines = "".join(self.buffer[offset:]).split("\n")
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cursor_found = False
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lines_beyond_cursor = 0
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for ln, line in enumerate(lines, num_common_lines):
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ll = len(line)
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if 0 <= pos <= ll:
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self.lxy = pos, ln
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cursor_found = True
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elif cursor_found:
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lines_beyond_cursor += 1
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if lines_beyond_cursor > self.console.height:
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# No need to keep formatting lines.
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# The console can't show them.
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break
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prompt = self.get_prompt(ln, ll >= pos >= 0)
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while "\n" in prompt:
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pre_prompt, _, prompt = prompt.partition("\n")
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last_refresh_line_end_offsets.append(offset)
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screen.append(pre_prompt)
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screeninfo.append((0, []))
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pos -= ll + 1
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prompt, lp = self.process_prompt(prompt)
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l, l2 = disp_str(line)
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wrapcount = (wlen(l) + lp) // self.console.width
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if wrapcount == 0:
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offset += ll + 1 # Takes all of the line plus the newline
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last_refresh_line_end_offsets.append(offset)
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screen.append(prompt + l)
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screeninfo.append((lp, l2))
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else:
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i = 0
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while l:
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prelen = lp if i == 0 else 0
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index_to_wrap_before = 0
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column = 0
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for character_width in l2:
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if column + character_width >= self.console.width - prelen:
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break
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index_to_wrap_before += 1
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column += character_width
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pre = prompt if i == 0 else ""
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if len(l) > index_to_wrap_before:
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offset += index_to_wrap_before
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post = "\\"
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after = [1]
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else:
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offset += index_to_wrap_before + 1 # Takes the newline
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post = ""
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after = []
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last_refresh_line_end_offsets.append(offset)
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screen.append(pre + l[:index_to_wrap_before] + post)
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screeninfo.append((prelen, l2[:index_to_wrap_before] + after))
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l = l[index_to_wrap_before:]
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l2 = l2[index_to_wrap_before:]
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i += 1
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self.screeninfo = screeninfo
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self.cxy = self.pos2xy()
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if self.msg:
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for mline in self.msg.split("\n"):
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screen.append(mline)
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screeninfo.append((0, []))
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self.last_refresh_cache.update_cache(self, screen, screeninfo)
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return screen
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@staticmethod
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def process_prompt(prompt: str) -> tuple[str, int]:
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"""Process the prompt.
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This means calculate the length of the prompt. The character \x01
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and \x02 are used to bracket ANSI control sequences and need to be
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excluded from the length calculation. So also a copy of the prompt
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is returned with these control characters removed."""
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# The logic below also ignores the length of common escape
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# sequences if they were not explicitly within \x01...\x02.
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# They are CSI (or ANSI) sequences ( ESC [ ... LETTER )
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# wlen from utils already excludes ANSI_ESCAPE_SEQUENCE chars,
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# which breaks the logic below so we redefine it here.
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def wlen(s: str) -> int:
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return sum(str_width(i) for i in s)
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out_prompt = ""
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l = wlen(prompt)
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pos = 0
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while True:
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s = prompt.find("\x01", pos)
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if s == -1:
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break
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e = prompt.find("\x02", s)
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if e == -1:
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break
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# Found start and end brackets, subtract from string length
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l = l - (e - s + 1)
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keep = prompt[pos:s]
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l -= sum(map(wlen, ANSI_ESCAPE_SEQUENCE.findall(keep)))
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out_prompt += keep + prompt[s + 1 : e]
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pos = e + 1
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keep = prompt[pos:]
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l -= sum(map(wlen, ANSI_ESCAPE_SEQUENCE.findall(keep)))
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out_prompt += keep
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return out_prompt, l
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def bow(self, p: int | None = None) -> int:
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"""Return the 0-based index of the word break preceding p most
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immediately.
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p defaults to self.pos; word boundaries are determined using
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self.syntax_table."""
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if p is None:
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p = self.pos
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st = self.syntax_table
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b = self.buffer
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p -= 1
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while p >= 0 and st.get(b[p], SYNTAX_WORD) != SYNTAX_WORD:
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p -= 1
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while p >= 0 and st.get(b[p], SYNTAX_WORD) == SYNTAX_WORD:
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p -= 1
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return p + 1
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def eow(self, p: int | None = None) -> int:
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"""Return the 0-based index of the word break following p most
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immediately.
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p defaults to self.pos; word boundaries are determined using
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self.syntax_table."""
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if p is None:
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p = self.pos
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st = self.syntax_table
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b = self.buffer
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while p < len(b) and st.get(b[p], SYNTAX_WORD) != SYNTAX_WORD:
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p += 1
|
|
while p < len(b) and st.get(b[p], SYNTAX_WORD) == SYNTAX_WORD:
|
|
p += 1
|
|
return p
|
|
|
|
def bol(self, p: int | None = None) -> int:
|
|
"""Return the 0-based index of the line break preceding p most
|
|
immediately.
|
|
|
|
p defaults to self.pos."""
|
|
if p is None:
|
|
p = self.pos
|
|
b = self.buffer
|
|
p -= 1
|
|
while p >= 0 and b[p] != "\n":
|
|
p -= 1
|
|
return p + 1
|
|
|
|
def eol(self, p: int | None = None) -> int:
|
|
"""Return the 0-based index of the line break following p most
|
|
immediately.
|
|
|
|
p defaults to self.pos."""
|
|
if p is None:
|
|
p = self.pos
|
|
b = self.buffer
|
|
while p < len(b) and b[p] != "\n":
|
|
p += 1
|
|
return p
|
|
|
|
def max_column(self, y: int) -> int:
|
|
"""Return the last x-offset for line y"""
|
|
return self.screeninfo[y][0] + sum(self.screeninfo[y][1])
|
|
|
|
def max_row(self) -> int:
|
|
return len(self.screeninfo) - 1
|
|
|
|
def get_arg(self, default: int = 1) -> int:
|
|
"""Return any prefix argument that the user has supplied,
|
|
returning 'default' if there is None. Defaults to 1.
|
|
"""
|
|
if self.arg is None:
|
|
return default
|
|
return self.arg
|
|
|
|
def get_prompt(self, lineno: int, cursor_on_line: bool) -> str:
|
|
"""Return what should be in the left-hand margin for line
|
|
'lineno'."""
|
|
if self.arg is not None and cursor_on_line:
|
|
prompt = f"(arg: {self.arg}) "
|
|
elif self.paste_mode and not self.in_bracketed_paste:
|
|
prompt = "(paste) "
|
|
elif "\n" in self.buffer:
|
|
if lineno == 0:
|
|
prompt = self.ps2
|
|
elif self.ps4 and lineno == self.buffer.count("\n"):
|
|
prompt = self.ps4
|
|
else:
|
|
prompt = self.ps3
|
|
else:
|
|
prompt = self.ps1
|
|
|
|
if self.can_colorize:
|
|
prompt = f"{ANSIColors.BOLD_MAGENTA}{prompt}{ANSIColors.RESET}"
|
|
return prompt
|
|
|
|
def push_input_trans(self, itrans: input.KeymapTranslator) -> None:
|
|
self.input_trans_stack.append(self.input_trans)
|
|
self.input_trans = itrans
|
|
|
|
def pop_input_trans(self) -> None:
|
|
self.input_trans = self.input_trans_stack.pop()
|
|
|
|
def setpos_from_xy(self, x: int, y: int) -> None:
|
|
"""Set pos according to coordinates x, y"""
|
|
pos = 0
|
|
i = 0
|
|
while i < y:
|
|
prompt_len, character_widths = self.screeninfo[i]
|
|
offset = len(character_widths) - character_widths.count(0)
|
|
in_wrapped_line = prompt_len + sum(character_widths) >= self.console.width
|
|
if in_wrapped_line:
|
|
pos += offset - 1 # -1 cause backslash is not in buffer
|
|
else:
|
|
pos += offset + 1 # +1 cause newline is in buffer
|
|
i += 1
|
|
|
|
j = 0
|
|
cur_x = self.screeninfo[i][0]
|
|
while cur_x < x:
|
|
if self.screeninfo[i][1][j] == 0:
|
|
continue
|
|
cur_x += self.screeninfo[i][1][j]
|
|
j += 1
|
|
pos += 1
|
|
|
|
self.pos = pos
|
|
|
|
def pos2xy(self) -> tuple[int, int]:
|
|
"""Return the x, y coordinates of position 'pos'."""
|
|
# this *is* incomprehensible, yes.
|
|
y = 0
|
|
pos = self.pos
|
|
assert 0 <= pos <= len(self.buffer)
|
|
if pos == len(self.buffer):
|
|
y = len(self.screeninfo) - 1
|
|
p, l2 = self.screeninfo[y]
|
|
return p + sum(l2) + l2.count(0), y
|
|
|
|
for p, l2 in self.screeninfo:
|
|
l = len(l2) - l2.count(0)
|
|
in_wrapped_line = p + sum(l2) >= self.console.width
|
|
offset = l - 1 if in_wrapped_line else l # need to remove backslash
|
|
if offset >= pos:
|
|
break
|
|
|
|
if p + sum(l2) >= self.console.width:
|
|
pos -= l - 1 # -1 cause backslash is not in buffer
|
|
else:
|
|
pos -= l + 1 # +1 cause newline is in buffer
|
|
y += 1
|
|
return p + sum(l2[:pos]), y
|
|
|
|
def insert(self, text: str | list[str]) -> None:
|
|
"""Insert 'text' at the insertion point."""
|
|
self.buffer[self.pos : self.pos] = list(text)
|
|
self.pos += len(text)
|
|
self.dirty = True
|
|
|
|
def update_cursor(self) -> None:
|
|
"""Move the cursor to reflect changes in self.pos"""
|
|
self.cxy = self.pos2xy()
|
|
self.console.move_cursor(*self.cxy)
|
|
|
|
def after_command(self, cmd: Command) -> None:
|
|
"""This function is called to allow post command cleanup."""
|
|
if getattr(cmd, "kills_digit_arg", True):
|
|
if self.arg is not None:
|
|
self.dirty = True
|
|
self.arg = None
|
|
|
|
def prepare(self) -> None:
|
|
"""Get ready to run. Call restore when finished. You must not
|
|
write to the console in between the calls to prepare and
|
|
restore."""
|
|
try:
|
|
self.console.prepare()
|
|
self.arg = None
|
|
self.finished = False
|
|
del self.buffer[:]
|
|
self.pos = 0
|
|
self.dirty = True
|
|
self.last_command = None
|
|
self.calc_screen()
|
|
except BaseException:
|
|
self.restore()
|
|
raise
|
|
|
|
while self.scheduled_commands:
|
|
cmd = self.scheduled_commands.pop()
|
|
self.do_cmd((cmd, []))
|
|
|
|
def last_command_is(self, cls: type) -> bool:
|
|
if not self.last_command:
|
|
return False
|
|
return issubclass(cls, self.last_command)
|
|
|
|
def restore(self) -> None:
|
|
"""Clean up after a run."""
|
|
self.console.restore()
|
|
|
|
@contextmanager
|
|
def suspend(self) -> SimpleContextManager:
|
|
"""A context manager to delegate to another reader."""
|
|
prev_state = {f.name: getattr(self, f.name) for f in fields(self)}
|
|
try:
|
|
self.restore()
|
|
yield
|
|
finally:
|
|
for arg in ("msg", "ps1", "ps2", "ps3", "ps4", "paste_mode"):
|
|
setattr(self, arg, prev_state[arg])
|
|
self.prepare()
|
|
|
|
def finish(self) -> None:
|
|
"""Called when a command signals that we're finished."""
|
|
pass
|
|
|
|
def error(self, msg: str = "none") -> None:
|
|
self.msg = "! " + msg + " "
|
|
self.dirty = True
|
|
self.console.beep()
|
|
|
|
def update_screen(self) -> None:
|
|
if self.dirty:
|
|
self.refresh()
|
|
|
|
def refresh(self) -> None:
|
|
"""Recalculate and refresh the screen."""
|
|
if self.in_bracketed_paste and self.buffer and not self.buffer[-1] == "\n":
|
|
return
|
|
|
|
# this call sets up self.cxy, so call it first.
|
|
self.screen = self.calc_screen()
|
|
self.console.refresh(self.screen, self.cxy)
|
|
self.dirty = False
|
|
|
|
def do_cmd(self, cmd: tuple[str, list[str]]) -> None:
|
|
"""`cmd` is a tuple of "event_name" and "event", which in the current
|
|
implementation is always just the "buffer" which happens to be a list
|
|
of single-character strings."""
|
|
|
|
trace("received command {cmd}", cmd=cmd)
|
|
if isinstance(cmd[0], str):
|
|
command_type = self.commands.get(cmd[0], commands.invalid_command)
|
|
elif isinstance(cmd[0], type):
|
|
command_type = cmd[0]
|
|
else:
|
|
return # nothing to do
|
|
|
|
command = command_type(self, *cmd) # type: ignore[arg-type]
|
|
command.do()
|
|
|
|
self.after_command(command)
|
|
|
|
if self.dirty:
|
|
self.refresh()
|
|
else:
|
|
self.update_cursor()
|
|
|
|
if not isinstance(cmd, commands.digit_arg):
|
|
self.last_command = command_type
|
|
|
|
self.finished = bool(command.finish)
|
|
if self.finished:
|
|
self.console.finish()
|
|
self.finish()
|
|
|
|
def handle1(self, block: bool = True) -> bool:
|
|
"""Handle a single event. Wait as long as it takes if block
|
|
is true (the default), otherwise return False if no event is
|
|
pending."""
|
|
|
|
if self.msg:
|
|
self.msg = ""
|
|
self.dirty = True
|
|
|
|
while True:
|
|
input_hook = self.console.input_hook
|
|
if input_hook:
|
|
input_hook()
|
|
# We use the same timeout as in readline.c: 100ms
|
|
while not self.console.wait(100):
|
|
input_hook()
|
|
event = self.console.get_event(block=False)
|
|
else:
|
|
event = self.console.get_event(block)
|
|
if not event: # can only happen if we're not blocking
|
|
return False
|
|
|
|
translate = True
|
|
|
|
if event.evt == "key":
|
|
self.input_trans.push(event)
|
|
elif event.evt == "scroll":
|
|
self.refresh()
|
|
elif event.evt == "resize":
|
|
self.refresh()
|
|
else:
|
|
translate = False
|
|
|
|
if translate:
|
|
cmd = self.input_trans.get()
|
|
else:
|
|
cmd = [event.evt, event.data]
|
|
|
|
if cmd is None:
|
|
if block:
|
|
continue
|
|
else:
|
|
return False
|
|
|
|
self.do_cmd(cmd)
|
|
return True
|
|
|
|
def push_char(self, char: int | bytes) -> None:
|
|
self.console.push_char(char)
|
|
self.handle1(block=False)
|
|
|
|
def readline(self, startup_hook: Callback | None = None) -> str:
|
|
"""Read a line. The implementation of this method also shows
|
|
how to drive Reader if you want more control over the event
|
|
loop."""
|
|
self.prepare()
|
|
try:
|
|
if startup_hook is not None:
|
|
startup_hook()
|
|
self.refresh()
|
|
while not self.finished:
|
|
self.handle1()
|
|
return self.get_unicode()
|
|
|
|
finally:
|
|
self.restore()
|
|
|
|
def bind(self, spec: KeySpec, command: CommandName) -> None:
|
|
self.keymap = self.keymap + ((spec, command),)
|
|
self.input_trans = input.KeymapTranslator(
|
|
self.keymap, invalid_cls="invalid-key", character_cls="self-insert"
|
|
)
|
|
|
|
def get_unicode(self) -> str:
|
|
"""Return the current buffer as a unicode string."""
|
|
return "".join(self.buffer)
|