89 lines
2.2 KiB
Python
89 lines
2.2 KiB
Python
import os
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import sys
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import time
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from contextlib import contextmanager
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from curses.ascii import SP
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from queue import Queue
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from threading import Thread
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if os.name == "nt":
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import ctypes
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import msvcrt
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class _CursorInfo(ctypes.Structure):
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_fields_ = [("size", ctypes.c_int), ("visible", ctypes.c_byte)]
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class Spinner:
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def __init__(self, message: str) -> None:
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self.message = message
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self.queue: Queue[int] = Queue()
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self.spinner = self.cursor()
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self.thread = Thread(target=self.run)
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def start(self):
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self.queue.put(1)
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self.thread.start()
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self.hide()
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def run(self):
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while self.queue.get():
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output = f"\r{self.message} [{next(self.spinner)}]"
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sys.stdout.write(output)
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sys.stdout.flush()
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time.sleep(0.1)
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self.queue.put(1)
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def stop(self):
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self.queue.put(0)
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self.thread.join()
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self.show()
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@staticmethod
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def cursor():
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while True:
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for cursor in "|/-\\":
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yield cursor
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@staticmethod
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def hide():
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if os.name == "nt":
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ci = _CursorInfo()
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handle = ctypes.windll.kernel32.GetStdHandle(-11)
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ctypes.windll.kernel32.GetConsoleCursorInfo(
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handle, ctypes.byref(ci)
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)
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ci.visible = False
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ctypes.windll.kernel32.SetConsoleCursorInfo(
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handle, ctypes.byref(ci)
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)
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elif os.name == "posix":
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sys.stdout.write("\033[?25l")
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sys.stdout.flush()
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@staticmethod
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def show():
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if os.name == "nt":
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ci = _CursorInfo()
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handle = ctypes.windll.kernel32.GetStdHandle(-11)
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ctypes.windll.kernel32.GetConsoleCursorInfo(
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handle, ctypes.byref(ci)
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)
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ci.visible = True
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ctypes.windll.kernel32.SetConsoleCursorInfo(
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handle, ctypes.byref(ci)
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)
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elif os.name == "posix":
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sys.stdout.write("\033[?25h")
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sys.stdout.flush()
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@contextmanager
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def loading(message: str = "Loading"):
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spinner = Spinner(message)
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spinner.start()
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yield
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spinner.stop()
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