55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
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import io
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from typing import IO, TYPE_CHECKING, Any, List
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from .ansi import AnsiDecoder
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from .text import Text
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if TYPE_CHECKING:
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from .console import Console
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class FileProxy(io.TextIOBase):
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"""Wraps a file (e.g. sys.stdout) and redirects writes to a console."""
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def __init__(self, console: "Console", file: IO[str]) -> None:
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self.__console = console
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self.__file = file
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self.__buffer: List[str] = []
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self.__ansi_decoder = AnsiDecoder()
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@property
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def rich_proxied_file(self) -> IO[str]:
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"""Get proxied file."""
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return self.__file
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def __getattr__(self, name: str) -> Any:
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return getattr(self.__file, name)
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def write(self, text: str) -> int:
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if not isinstance(text, str):
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raise TypeError(f"write() argument must be str, not {type(text).__name__}")
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buffer = self.__buffer
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lines: List[str] = []
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while text:
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line, new_line, text = text.partition("\n")
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if new_line:
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lines.append("".join(buffer) + line)
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del buffer[:]
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else:
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buffer.append(line)
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break
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if lines:
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console = self.__console
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with console:
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output = Text("\n").join(
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self.__ansi_decoder.decode_line(line) for line in lines
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)
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console.print(output)
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return len(text)
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def flush(self) -> None:
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output = "".join(self.__buffer)
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if output:
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self.__console.print(output)
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del self.__buffer[:]
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