Disable undo menu item when there is no more history available

[mjbvz]

From #55389

Feature request
Disable the undo menu item if there is no undo history available.

(same for redo if there is no more forward history)

[bpasero]

Shouldn't the editor provide this a as a context key @alexandrudima ?

[alexdima]

This is blocked by #55453, currently the global context is evaluated when computing the enablement/disablement of extensions.

[sbatten]

we would need an activeEditorCanUndo key much like activeEditorCanSave

[kanlukasz]

Definitely a very, very important function.
We need to know if there is something to undo or repeat. Sometimes it's very important

Examples from other editors:

N++ - no redo

N++ - no undo

ST3 - no undo

ST3 - no redo

I keep my fingers crossed for it

[kanlukasz]

Is that still blocked by #55453 ?
I ask because #55453 is closed

[sbatten]

@alexdima I know undo state has been modified recently, any changes that would help here?

[alexdima]

@sbatten Yes, the undo redo service can be queried based on the current focused editor and asked if there is anything to undo or to redo. But this still depends on focus, so we would need to have a global context key that updates every time focus is changed.

[psnet]

Any movement?.. 2023 is now. Sometimes this is must, and it still appears unresolved