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import code
import sys
import typing as t
from html import escape
from types import CodeType
from ..local import Local
from .repr import debug_repr
from .repr import dump
from .repr import helper
if t.TYPE_CHECKING:
import codeop # noqa: F401
_local = Local()
class HTMLStringO:
"""A StringO version that HTML escapes on write."""
def __init__(self) -> None:
self._buffer: t.List[str] = []
def isatty(self) -> bool:
return False
def close(self) -> None:
pass
def flush(self) -> None:
pass
def seek(self, n: int, mode: int = 0) -> None:
pass
def readline(self) -> str:
if len(self._buffer) == 0:
return ""
ret = self._buffer[0]
del self._buffer[0]
return ret
def reset(self) -> str:
val = "".join(self._buffer)
del self._buffer[:]
return val
def _write(self, x: str) -> None:
if isinstance(x, bytes):
x = x.decode("utf-8", "replace")
self._buffer.append(x)
def write(self, x: str) -> None:
self._write(escape(x))
def writelines(self, x: t.Iterable[str]) -> None:
self._write(escape("".join(x)))
class ThreadedStream:
"""Thread-local wrapper for sys.stdout for the interactive console."""
@staticmethod
def push() -> None:
if not isinstance(sys.stdout, ThreadedStream):
sys.stdout = t.cast(t.TextIO, ThreadedStream())
_local.stream = HTMLStringO()
@staticmethod
def fetch() -> str:
try:
stream = _local.stream
except AttributeError:
return ""
return stream.reset() # type: ignore
@staticmethod
def displayhook(obj: object) -> None:
try:
stream = _local.stream
except AttributeError:
return _displayhook(obj) # type: ignore
# stream._write bypasses escaping as debug_repr is
# already generating HTML for us.
if obj is not None:
_local._current_ipy.locals["_"] = obj
stream._write(debug_repr(obj))
def __setattr__(self, name: str, value: t.Any) -> None:
raise AttributeError(f"read only attribute {name}")
def __dir__(self) -> t.List[str]:
return dir(sys.__stdout__)
def __getattribute__(self, name: str) -> t.Any:
try:
stream = _local.stream
except AttributeError:
stream = sys.__stdout__
return getattr(stream, name)
def __repr__(self) -> str:
return repr(sys.__stdout__)
# add the threaded stream as display hook
_displayhook = sys.displayhook
sys.displayhook = ThreadedStream.displayhook
class _ConsoleLoader:
def __init__(self) -> None:
self._storage: t.Dict[int, str] = {}
def register(self, code: CodeType, source: str) -> None:
self._storage[id(code)] = source
# register code objects of wrapped functions too.
for var in code.co_consts:
if isinstance(var, CodeType):
self._storage[id(var)] = source
def get_source_by_code(self, code: CodeType) -> t.Optional[str]:
try:
return self._storage[id(code)]
except KeyError:
return None
class _InteractiveConsole(code.InteractiveInterpreter):
locals: t.Dict[str, t.Any]
def __init__(self, globals: t.Dict[str, t.Any], locals: t.Dict[str, t.Any]) -> None:
self.loader = _ConsoleLoader()
locals = {
**globals,
**locals,
"dump": dump,
"help": helper,
"__loader__": self.loader,
}
super().__init__(locals)
original_compile = self.compile
def compile(source: str, filename: str, symbol: str) -> t.Optional[CodeType]:
code = original_compile(source, filename, symbol)
if code is not None:
self.loader.register(code, source)
return code
self.compile = compile # type: ignore[assignment]
self.more = False
self.buffer: t.List[str] = []
def runsource(self, source: str, **kwargs: t.Any) -> str: # type: ignore
source = f"{source.rstrip()}\n"
ThreadedStream.push()
prompt = "... " if self.more else ">>> "
try:
source_to_eval = "".join(self.buffer + [source])
if super().runsource(source_to_eval, "<debugger>", "single"):
self.more = True
self.buffer.append(source)
else:
self.more = False
del self.buffer[:]
finally:
output = ThreadedStream.fetch()
return prompt + escape(source) + output
def runcode(self, code: CodeType) -> None:
try:
exec(code, self.locals)
except Exception:
self.showtraceback()
def showtraceback(self) -> None:
from .tbtools import get_current_traceback
tb = get_current_traceback(skip=1)
sys.stdout._write(tb.render_summary()) # type: ignore
def showsyntaxerror(self, filename: t.Optional[str] = None) -> None:
from .tbtools import get_current_traceback
tb = get_current_traceback(skip=4)
sys.stdout._write(tb.render_summary()) # type: ignore
def write(self, data: str) -> None:
sys.stdout.write(data)
class Console:
"""An interactive console."""
def __init__(
self,
globals: t.Optional[t.Dict[str, t.Any]] = None,
locals: t.Optional[t.Dict[str, t.Any]] = None,
) -> None:
if locals is None:
locals = {}
if globals is None:
globals = {}
self._ipy = _InteractiveConsole(globals, locals)
def eval(self, code: str) -> str:
_local._current_ipy = self._ipy
old_sys_stdout = sys.stdout
try:
return self._ipy.runsource(code)
finally:
sys.stdout = old_sys_stdout
|
