Shared fermata fixes

[miiizen]

Resolves: #34441

This fixes fermatas on chords and barlines.

[coderabbitai]

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• src/engraving/dom/spanner.cpp

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📝 Walkthrough

Walkthrough

EngravingItem::connectSharedItem now rejects chords before creating shared-item links. Fermata handling resolves chord origins to up notes, accepts barline anchors, and selects barline elements from the staff’s first voice. Spanner::removed() now detaches used and unused segments from their parent systems.

Merge Risk: ⚪ Minimal · up to 78cc7

This localized change adjusts fermata handling for chords and barlines; no actionable merge-blocking risk remains, so it is merge-ready after normal checks.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description states the linked issue, summarizes the fix, and provides an example image. However, it omits the repository checklist and its required completion status.	Add the complete checklist from the repository template. Mark each item accurately, including CLA status, title validation, commit messages, coding rules, testing, prior attempts, unnecessary changes, and unit or vtest coverage where applic…
Docstring Coverage	⚠️ Warning	Docstring coverage is 22.22% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 5 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: fixes for shared fermatas.
Linked Issues check	✅ Passed	The changes address issue #34441 by handling fermatas associated with shared chords and barlines. The chord-link validation, origin resolution, barline layout handling, and spanner cleanup support fer…
Out of Scope Changes check	✅ Passed	The reported changes are related to shared fermata handling and its supporting layout and spanner cleanup. No unrelated code changes are evident.

Full details: Description check

Resolution

Add the complete checklist from the repository template. Mark each item accurately, including CLA status, title validation, commit messages, coding rules, testing, prior attempts, unnecessary changes, and unit or vtest coverage where applicable.

Full details: Linked Issues check

Explanation

The changes address issue #34441 by handling fermatas associated with shared chords and barlines. The chord-link validation, origin resolution, barline layout handling, and spanner cleanup support fermata rendering on shared staves.

✨ Finishing Touches

🧪 Generate unit tests (beta)

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Warning

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Actionable comments posted: 1

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Inline comments:
In `@src/engraving/rendering/score/stavesharinglayout.cpp`:
- Around line 1109-1114: In the fermata origin handling around
fermataOriginBaseItem, check the result of seg->element(originTrack) for null
and return before calling isChord(). Then resolve chord items with upNote() and
continue only when the resulting item is valid and is either sharedItem() or a
barline.

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ℹ️ Review info

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📥 Commits

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📒 Files selected for processing (3)

• src/engraving/dom/engravingitem.cpp
• src/engraving/rendering/score/stavesharinglayout.cpp
• vtest/scores/stave-sharing-03.mscz

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[davidstephengrant]

@miiizen Ties may linger on the incorrect staff when stave allocation changes.

In the attached score fermata.mscz.zip:

1. Toggle stave sharing on
   Result: Cls.1–2 (voice 1) and Cl.3 (voice 2) on a single staff. All OK.
2. Toggle stave sharing off.
3. Delete the fermata for Cl.2
4. Toggle stave sharing on.
   Result: Cls.1–2 on staff 1 in separate voices, but Cl.3's tie is incorrectly duplicated on this staff. Relayout fixes the issue.

This may be due to something unrelated, but the fermata-on-barline steps seem to be a reliable way of provoking the issue.

Screen.Recording.2026-08-20.at.14.14.42.mov

[davidstephengrant]

Also, fermatas in the lower voice are not centred precisely on barlines.

[coderabbitai]

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[miiizen]

@davidstephengrant fixed!

[coderabbitai]

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[davidstephengrant]

@miiizen Tested and approved on macOS 26.6.2.