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[PR #18445] Fix cursor hiding on input #31534

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opened 2026-01-31 09:47:51 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:47:51 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/18445

State: closed
Merged: Yes

The CoreWindow approach to implementing this has proven itself to be bug prone. This PR switches to using the much better Win32 ShowCursor API, which uses a reference count. This prevents the exact sort of race condition we have where we we disable the cursor in our code and the WinUI code then sets it to a different cursor internally which gets the system out of sync. There's no WinUI API to just hide the cursor and if it did, it would probably be a Boolean which would result in the same issue.

Closes #18400

Validation Steps Performed

It's difficult to assert the correctness of this approach, outside of just trying it out (which I did and it works). The good news is that this uses a static bool to ensure we only hide it exactly once and show it exactly once and we do the latter on every WM_ACTIVATE message which should hopefully restore the cursor when tabbing out and back in at least.

**Original Pull Request:** https://github.com/microsoft/terminal/pull/18445 **State:** closed **Merged:** Yes --- The CoreWindow approach to implementing this has proven itself to be bug prone. This PR switches to using the much better Win32 ShowCursor API, which uses a reference count. This prevents the exact sort of race condition we have where we we disable the cursor in our code and the WinUI code then sets it to a different cursor internally which gets the system out of sync. There's no WinUI API to just hide the cursor and if it did, it would probably be a Boolean which would result in the same issue. Closes #18400 ## Validation Steps Performed It's difficult to assert the correctness of this approach, outside of just trying it out (which I did and it works). The good news is that this uses a static bool to ensure we only hide it exactly once and show it exactly once and we do the latter on every WM_ACTIVATE message which should hopefully restore the cursor when tabbing out and back in at least.
claunia added the pull-request label 2026-01-31 09:47:51 +00:00
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Reference: starred/terminal#31534
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