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[PR #13907] Revert "Remove most uses of CompareInBounds (#13244)" #29830

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opened 2026-01-31 09:37:07 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:37:07 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/13907

State: closed
Merged: Yes

This reverts commit f785168aac (PR #13244)

The error logged to NVDA was caused by the following line of code in _getTextValue():
THROW_HR_IF(E_FAIL, !bufferSize.IsInBounds(_start) || !bufferSize.IsInBounds(_end));
NVDA would expand a text range to encompass the document in the alt buffer. This means that the "end" would be set to the dangling "endExclusive" point (x = left, y = one past the end of the buffer). This is a valid range!
However, upon extracting the text, we would hit the code above. The exclusive end doesn't actually point to anything in the buffer, so we would falsly throw E_FAIL.

Though this could be fixed by adding a special check for the endExclusive in the line above, I suspect there are other places throughout the UIA code that hit this problem too. The safest course of action is to revert this commit entirely since it was a code health commit (it doesn't actually close an issue).

Closes #13866

**Original Pull Request:** https://github.com/microsoft/terminal/pull/13907 **State:** closed **Merged:** Yes --- This reverts commit f785168aacf79e2923f0d140e17fdd4c9364e51d (PR #13244) The error logged to NVDA was caused by the following line of code in `_getTextValue()`: `THROW_HR_IF(E_FAIL, !bufferSize.IsInBounds(_start) || !bufferSize.IsInBounds(_end));` NVDA would expand a text range to encompass the document in the alt buffer. This means that the "end" would be set to the dangling "endExclusive" point (x = left, y = one past the end of the buffer). This is a valid range! However, upon extracting the text, we would hit the code above. The exclusive end doesn't actually point to anything in the buffer, so we would falsly throw `E_FAIL`. Though this could be fixed by adding a special check for the `endExclusive` in the line above, I suspect there are other places throughout the UIA code that hit this problem too. The safest course of action is to revert this commit entirely since it was a code health commit (it doesn't actually close an issue). Closes #13866
claunia added the pull-request label 2026-01-31 09:37:07 +00:00
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Reference: starred/terminal#29830
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