Add Ability to Enable/Disable Shortcuts and Selection for LineEdit/TextEdit

[codecustard]

This PR adds the ability to enable/disable shortcut keys and selection for LineEdit and TextEdit.

Closes: #31183

[akien-mga]

Closes: #31183

This issue also requests the same feature in TextEdit.

[akien-mga]

Needs a rebase to remove the merge commit and fix merge conflicts, otherwise I guess it should be ok to merge.

[Paulb23]

This doesn't seem to fix the linked issue? As it describes disabling selections not shortcuts.

In any case, you should only need to remove the shortcuts inside new method _generate_context_menu leaving the main switch alone.

[codecustard]

This doesn't seem to fix the linked issue? As it describes disabling selections not shortcuts.

In any case, you should only need to remove the shortcuts inside new method _generate_context_menu leaving the main switch alone.

I've tried that before, but it does not seem to have any effect. The context menu will show or not show the shortcut keys... but the switch statement causes the shortcut keys to have effect regardless of whether the context menu has them or not.

[Paulb23]

I've tried that before, but it does not seem to have any effect

Ahh my bad, I remember now, currently they are visual only. Related #29490, which will require shortcuts to handle echoed events before they can be changed.

In that case, there are a couple missing:

• select_all() on line 3459
• cut() on line 3201

[Paulb23]

Couple notes left inline, It's also still possible to select with the mouse or shift + arrow keys within line_edit.

[akien-mga]

Thanks!