fix(core): handle backspace decomposition 🍒 🏠#15494
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mcdurdin merged 2 commits intostable-18.0from Feb 4, 2026
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Ensure that when a single backspace decomposes the last NFC character in the app context, the remainder of the 'cluster' is preserved, matching the implication of the CLDR keyboard specification. This addresses the behavior in #15487 where the cached context became out of sync with the app context after deleting an entire NFC cluster such as ê, which caused a loop ending up with the entire context being deleted, at which point the loop exited with a fail-safe. Note that the LDML keyboard tests (ldml.cpp) do not currently exercise the normalization code; this is a gap that should be addressed to ensure that we are testing final application behavior. This cherry-pick only adds the direct normalization patch and unit test and skips the additional changes for logging. Fixes: #15487 Cherry-pick-of: #15488
User Test ResultsTest specification and instructions User tests are not required Test Artifacts
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Jan 26, 2026
Co-authored-by: srl295@gmail.com
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Changes in this pull request will be available for download in Keyman version 18.0.246 |
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Ensure that when a single backspace decomposes the last NFC character in the app context, the remainder of the 'cluster' is preserved, matching the implication of the CLDR keyboard specification.
This addresses the behavior in #15487 where the cached context became out of sync with the app context after deleting an entire NFC cluster such as ê, which caused a loop ending up with the entire context being deleted, at which point the loop exited with a fail-safe.
Note that the LDML keyboard tests (ldml.cpp) do not currently exercise the normalization code; this is a gap that should be addressed to ensure that we are testing final application behavior.
This cherry-pick only adds the direct normalization patch and unit test and skips the additional changes for logging.
Fixes: #15487
Cherry-pick-of: #15488
Test-bot: skip