Wraps a file (e.g. sys.stdout) and redirects writes to a console.
| 9 | |
| 10 | |
| 11 | class FileProxy(io.TextIOBase): |
| 12 | """Wraps a file (e.g. sys.stdout) and redirects writes to a console.""" |
| 13 | |
| 14 | def __init__(self, console: "Console", file: IO[str]) -> None: |
| 15 | self.__console = console |
| 16 | self.__file = file |
| 17 | self.__buffer: List[str] = [] |
| 18 | self.__ansi_decoder = AnsiDecoder() |
| 19 | |
| 20 | @property |
| 21 | def rich_proxied_file(self) -> IO[str]: |
| 22 | """Get proxied file.""" |
| 23 | return self.__file |
| 24 | |
| 25 | def __getattr__(self, name: str) -> Any: |
| 26 | return getattr(self.__file, name) |
| 27 | |
| 28 | def write(self, text: str) -> int: |
| 29 | if not isinstance(text, str): |
| 30 | raise TypeError(f"write() argument must be str, not {type(text).__name__}") |
| 31 | buffer = self.__buffer |
| 32 | lines: List[str] = [] |
| 33 | while text: |
| 34 | line, new_line, text = text.partition("\n") |
| 35 | if new_line: |
| 36 | lines.append("".join(buffer) + line) |
| 37 | buffer.clear() |
| 38 | else: |
| 39 | buffer.append(line) |
| 40 | break |
| 41 | if lines: |
| 42 | console = self.__console |
| 43 | with console: |
| 44 | output = Text("\n").join( |
| 45 | self.__ansi_decoder.decode_line(line) for line in lines |
| 46 | ) |
| 47 | console.print(output) |
| 48 | return len(text) |
| 49 | |
| 50 | def flush(self) -> None: |
| 51 | output = "".join(self.__buffer) |
| 52 | if output: |
| 53 | self.__console.print(output) |
| 54 | del self.__buffer[:] |
| 55 | |
| 56 | def fileno(self) -> int: |
| 57 | return self.__file.fileno() |
| 58 | |
| 59 | def isatty(self) -> bool: |
| 60 | return self.__file.isatty() |
no outgoing calls