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# Copyright 2000-2010 Michael Hudson-Doyle <micahel@gmail.com>
# Armin Rigo
#
# All Rights Reserved
#
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose is hereby granted without fee,
# provided that the above copyright notice appear in all copies and
# that both that copyright notice and this permission notice appear in
# supporting documentation.
#
# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
"""This is an alternative to python_reader which tries to emulate
the CPython prompt as closely as possible, with the exception of
allowing multiline input and multiline history entries.
"""
from __future__ import annotations
import _sitebuiltins
import linecache
import functools
import sys
import code
from .readline import _get_reader, multiline_input
TYPE_CHECKING = False
if TYPE_CHECKING:
from typing import Any
_error: tuple[type[Exception], ...] | type[Exception]
try:
from .unix_console import _error
except ModuleNotFoundError:
from .windows_console import _error
def check() -> str:
"""Returns the error message if there is a problem initializing the state."""
try:
_get_reader()
except _error as e:
return str(e) or repr(e) or "unknown error"
return ""
def _strip_final_indent(text: str) -> str:
# kill spaces and tabs at the end, but only if they follow '\n'.
# meant to remove the auto-indentation only (although it would of
# course also remove explicitly-added indentation).
short = text.rstrip(" \t")
n = len(short)
if n > 0 and text[n - 1] == "\n":
return short
return text
def _clear_screen():
reader = _get_reader()
reader.scheduled_commands.append("clear_screen")
REPL_COMMANDS = {
"exit": _sitebuiltins.Quitter('exit', ''),
"quit": _sitebuiltins.Quitter('quit' ,''),
"copyright": _sitebuiltins._Printer('copyright', sys.copyright),
"help": "help",
"clear": _clear_screen,
}
def _more_lines(console: code.InteractiveConsole, unicodetext: str) -> bool:
# ooh, look at the hack:
src = _strip_final_indent(unicodetext)
try:
code = console.compile(src, "<stdin>", "single")
except (OverflowError, SyntaxError, ValueError):
lines = src.splitlines(keepends=True)
if len(lines) == 1:
return False
last_line = lines[-1]
was_indented = last_line.startswith((" ", "\t"))
not_empty = last_line.strip() != ""
incomplete = not last_line.endswith("\n")
return (was_indented or not_empty) and incomplete
else:
return code is None
def run_multiline_interactive_console(
console: code.InteractiveConsole,
*,
future_flags: int = 0,
) -> None:
from .readline import _setup
_setup(console.locals)
if future_flags:
console.compile.compiler.flags |= future_flags
more_lines = functools.partial(_more_lines, console)
input_n = 0
def maybe_run_command(statement: str) -> bool:
statement = statement.strip()
if statement in console.locals or statement not in REPL_COMMANDS:
return False
reader = _get_reader()
reader.history.pop() # skip internal commands in history
command = REPL_COMMANDS[statement]
if callable(command):
command()
return True
if isinstance(command, str):
# Internal readline commands require a prepared reader like
# inside multiline_input.
reader.prepare()
reader.refresh()
reader.do_cmd((command, [statement]))
reader.restore()
return True
return False
while 1:
try:
try:
sys.stdout.flush()
except Exception:
pass
ps1 = getattr(sys, "ps1", ">>> ")
ps2 = getattr(sys, "ps2", "... ")
try:
statement = multiline_input(more_lines, ps1, ps2)
except EOFError:
break
if maybe_run_command(statement):
continue
input_name = f"<python-input-{input_n}>"
linecache._register_code(input_name, statement, "<stdin>") # type: ignore[attr-defined]
more = console.push(_strip_final_indent(statement), filename=input_name, _symbol="single") # type: ignore[call-arg]
assert not more
input_n += 1
except KeyboardInterrupt:
r = _get_reader()
if r.last_command and 'isearch' in r.last_command.__name__:
r.isearch_direction = ''
r.console.forgetinput()
r.pop_input_trans()
r.dirty = True
r.refresh()
r.in_bracketed_paste = False
console.write("\nKeyboardInterrupt\n")
console.resetbuffer()
except MemoryError:
console.write("\nMemoryError\n")
console.resetbuffer()
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