65 lines
2 KiB
Python
65 lines
2 KiB
Python
# Copyright 2022 The HuggingFace Team and Brian Chao. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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A utility for showing and hiding the terminal cursor on Windows and Linux, based on https://github.com/bchao1/bullet
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"""
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import os
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import sys
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from contextlib import contextmanager
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# Windows only
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if os.name == "nt":
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import ctypes
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import msvcrt # noqa
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class CursorInfo(ctypes.Structure):
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# _fields is a specific attr expected by ctypes
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_fields_ = [("size", ctypes.c_int), ("visible", ctypes.c_byte)]
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def hide_cursor():
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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(handle, ctypes.byref(ci))
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ci.visible = False
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ctypes.windll.kernel32.SetConsoleCursorInfo(handle, ctypes.byref(ci))
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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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def show_cursor():
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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(handle, ctypes.byref(ci))
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ci.visible = True
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ctypes.windll.kernel32.SetConsoleCursorInfo(handle, ctypes.byref(ci))
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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 hide():
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"Context manager to hide the terminal cursor"
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try:
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hide_cursor()
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yield
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finally:
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show_cursor()
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