Fix slur loss when Explode moves a grace-noted note to another staff - #34810
Fix slur loss when Explode moves a grace-noted note to another staff#34810tharos-devs wants to merge 2 commits into
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Explode/Implode clone voices between staves via CloneVoice::cloneVoice() with unlinked clones. The slur-reconnection code in doCloneVoice() looked up the new start/end ChordRest through the old element's links() list, which is only populated for linked clones (the "exchange voice" case), so it silently failed to reconnect slurs for Explode/Implode. Plain notes were rescued by a later tick/track-based fallback in Spanner::findStartCR()/findEndCR(), but that fallback can only resolve to the ChordRest actually stored in a Segment's track slot - never a grace chord, which shares its parent's tick. So a slur anchored on a grace note had no way to be recovered and was dropped. Add a ChordRest -> clone map (reusing the existing ElementMap type used by TieMap/TupletMap) populated for both main chords and grace chords while cloning, and consult it first when reconnecting slurs/hairpins/ hammer-on-pull-offs, falling back to the old links()-based lookup for any endpoint outside the cloned range. Resolves musescore#34809
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Merge Risk: ⚪ Minimal · up to Explode now preserves spanners connected to grace notes when voices move to separate staves. No current merge-blocking risk is identified. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Inline comments:
In `@src/engraving/editing/clonevoice.cpp`:
- Line 77: Update the clone-voice mapping flow so crMap.add(ocr, ncr) runs only
after the full-measure-rest early-exit condition for non-first voices;
alternatively remove the mapping before continue. Ensure skipped rests are not
registered, while inserted chord rests remain mapped for copied hairpin endpoint
resolution.
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src/engraving/editing/clonevoice.cpp
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crMap.add(ocr, ncr) ran before the full-measure-rest early-exit for non-first voices, so a rest that got skipped (never added to the destination score) was still registered as the clone of ocr. A hairpin anchored on that rest would then resolve its endpoint to this orphaned, unattached clone instead of falling back to the tick/track lookup. Move the crMap.add() call after the skip check, so only ChordRests that actually survive into the destination score are ever returned as a spanner endpoint. Addresses CodeRabbit review comment on musescore#34810, resolves musescore#34809
3 participants
Resolves: #34809
Description
When a staff has 2+ voices and each voice's note has a grace note tied to
it via a slur, running Tools > Explode moves each voice down to its own
staff but drops the slur between the grace note and its main note on any
staff that isn't the original top staff. The voice that stays in place
keeps its slur.
Root cause
ImplodeExplode::explode()separates voices onto different staves viaCloneVoice::cloneVoice(..., link=false). IndoCloneVoice()(
src/engraving/editing/clonevoice.cpp), the code that reconnects acloned slur/hairpin/hammer-on-pull-off to its new start/end ChordRest
looked up the correspondence through the old element's
links()list -a mechanism that is only populated for linked clones (
linkedClone(),used by the "exchange voice" feature with
link=true), never for theplain
clone()used by Explode/Implode (link=false). So this lookupsilently failed for Explode.
Ordinary (non-grace) notes were rescued anyway by a later fallback,
Spanner::findStartCR()/findEndCR(), which re-resolves a danglingspanner endpoint via
Score::findCR(tick, track). That fallback can onlyreach the ChordRest actually stored in a Segment's track slot - never a
grace chord, which shares its parent's tick and is a child of the main
Chord rather than that stored object. So a slur anchored on a grace note
had no way to be recovered, and was silently dropped.
Fix
Added a
ChordRest -> clonemap indoCloneVoice()(reusing theexisting generic
ElementMaptype already used byTieMap/TupletMapin the same function - no new class needed), populated for both main
chords and grace chords while cloning. The slur/hairpin/hammer-on-pull-off
reconnection code now looks up this map first, falling back to the
previous
links()-based search only for endpoints outside the clonedrange. This fixes the reconnection uniformly for both link modes, rather
than special-casing grace notes.
Testing
All 7 existing
Engraving_ImplodeExplodeTestsunit tests pass (noregression).
Manually built and installed the app; reproduced the reported scenario
(2 voices, each with a slurred grace note, Explode) and confirmed both
slurs are now preserved after Explode.
I signed the CLA as tharosd
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