检测前端令牌是否可用于执行
如何检测前端令牌是否可以执行？或者，如何检测前端令牌是否执行失败？
示例：编辑->如果未选择任何内容，则复制命令不可用。在这种情况下，FrontEndTokenExecute["Copy"]只会发出蜂鸣声，但它没有给我任何（编程）指示它已失败。
How can I detect if a front end token is available to execute? Alternately, how can I detect if a front end token failed to execute?
Example: the Edit -> Copy command is not available if nothing is selected. FrontEndTokenExecute["Copy"] will simply beep in this case, but it gives me no (programmatic) indication that it has failed.
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我找到了一种方法来处理你的第二个问题，但它并不优雅：
Preferences > 中接口>消息和警告操作将次要用户界面警告设置为蜂鸣声并打印到控制台Notebooks[]左右）NotebookGet[NotebookObject[FrontEndObject[LinkObject["55d_shm", 1, 1]], 1]]/。笔记本[{___，单元格[a___]}，___]：> Cell[a]（当然，您的句柄看起来会有所不同）Cell["您试图编辑不可编辑的单元格。您可以将 \通过在“单元格属性”中选择“可编辑单元格”来编辑单元格
子菜单。", "消息", "消息", "MSG", 页宽 -> 窗口宽度,
显示单元格标签 ->确实，CellChangeTimes -> {3.534442831*10^9},
单元标签 -> "cantEditLockedCell"]
I found a method to deal with your second question, but it's not elegant:
Preferences > Interface > Message and Warning actionsset Minor user interface warnings to Beep and Print to ConsoleNotebooks[]or so)NotebookGet[NotebookObject[FrontEndObject[LinkObject["55d_shm", 1, 1]], 1]]/. Notebook[{___, Cell[a___]}, ___] :> Cell[a](your handle will look differently, of course)Cell["You tried to edit a cell that is not editable. You can make the \cell editable by choosing Cell Editable in the Cell Properties \
submenu.", "Message", "Message", "MSG", PageWidth -> WindowWidth,
ShowCellLabel -> True, CellChangeTimes -> {3.534442831*10^9},
CellTags -> "cantEditLockedCell"]