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# -*- coding: utf-8 -*-
"""锁屏时给出人话提示。
实测:
电脑锁屏时 ImageGrab.grab() 抛 OSError("screen grab failed"),
原来的报错就是原样透传"抓屏失败: screen grab failed" ——
用户看了不知道该怎么办。
改成:
检测到是这个原因时,直接说"电脑锁屏了(或没有桌面会话),
请先解锁屏幕再试"。
顺便:这是**常见情况**(人离开电脑就会锁),不是异常。
"""
from __future__ import annotations
import sys
from pathlib import Path
SCREEN = Path(r"C:\Users\shu\Desktop\deepseekagent\LanRemote\windows"
r"\lanremote\screen.py")
OLD = ''' with self._lock:
try:
image = ImageGrab.grab()
except Exception as exc: # noqa: BLE001
raise ScreenError(f"抓屏失败: {exc}") from exc'''
NEW = ''' with self._lock:
try:
image = ImageGrab.grab()
except Exception as exc: # noqa: BLE001
raise ScreenError(_grab_error_text(exc)) from exc'''
HELPER_ANCHOR = '''class ScreenCapturer:'''
HELPER_NEW = '''def _grab_error_text(error: Exception) -> str:
"""把抓屏失败翻译成人话。
锁屏是最常见的失败原因(离开电脑就会锁),
而且 Windows 锁屏时**不给抓屏**,报的是 OSError: screen grab failed。
直接透传这句用户看不懂,所以这里给出可操作的提示。
"""
text = str(error).lower()
if "screen grab failed" in text or "grab" in text:
return ("抓屏失败:电脑现在锁屏了(或没有桌面会话)。"
"请先解锁屏幕再试。")
return f"抓屏失败: {error}"
''' + HELPER_ANCHOR
def main() -> int:
text = SCREEN.read_text(encoding="utf-8")
if "_grab_error_text" in text:
print(" 已经改过")
return 0
ok = True
for old, new, label in ((HELPER_ANCHOR, HELPER_NEW, "加提示函数"),
(OLD, NEW, "用提示函数")):
if old not in text:
print(f" [失败] {label} —— 锚点没找到")
ok = False
continue
text = text.replace(old, new, 1)
print(f" {label}")
SCREEN.write_text(text, encoding="utf-8", newline="\n")
import ast
try:
ast.parse(text)
print(" screen.py 语法 OK")
except SyntaxError as exc:
print(f" screen.py 语法错误: 行 {exc.lineno}: {exc.msg}")
ok = False
return 0 if ok else 1
if __name__ == "__main__":
sys.exit(main())