From 5cff23496af7368ed5c795d8c8a0fdf925249b9f Mon Sep 17 00:00:00 2001
From: mike-spa <93707756+mike-spa@users.noreply.github.com>
Date: Thu, 16 Jan 2025 10:27:08 +0100
Subject: [PATCH] Add support for local time signature with parts

Resolves: #18089

Backport of #26100, commit 3, TODO
---
 libmscore/edit.cpp | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/libmscore/edit.cpp b/libmscore/edit.cpp
index 8848df6fcdd56..af0f309383ed6 100644
--- a/libmscore/edit.cpp
+++ b/libmscore/edit.cpp
@@ -605,12 +605,6 @@ bool Score::rewriteMeasures(Measure* fm, const Fraction& ns, int staffIdx)
       Measure* nm  = nullptr;
       LayoutBreak* sectionBreak = nullptr;
 
-      // disable local time sig modifications in linked staves
-      if (staffIdx != -1 && excerpts().size() > 0) {
-            MScore::setError(CANNOT_CHANGE_LOCAL_TIMESIG_HAS_EXCERPTS);
-            return false;
-            }
-
       //
       // split into Measure segments fm-lm
       //
@@ -774,10 +768,23 @@ void Score::cmdAddTimeSig(Measure* fm, int staffIdx, TimeSig* ts, bool local)
                         endStaffIdx   = startStaffIdx + 1;
                         }
                   else {
+#if 1
                         // TODO: get index for this score
                         qDebug("cmdAddTimeSig: unable to write local time signature change to linked score");
                         startStaffIdx = 0;
                         endStaffIdx   = 0;
+#else
+                        const Staff* thisStaff = staff(staffIdx);
+                        const Staff* linkedStaff = thisStaff->findLinkedInScore(score);
+                        if (linkedStaff) {
+                              startStaffIdx = linkedStaff->idx();
+                              endStaffIdx = startStaffIdx + 1;
+                              }
+                        else {
+                              startStaffIdx = 0;
+                              endStaffIdx = 0;
+                              }
+#endif
                         }
                   }
             else {
@@ -909,11 +916,6 @@ void Score::cmdAddTimeSig(Measure* fm, int staffIdx, TimeSig* ts, bool local)
 
 void Score::cmdRemoveTimeSig(TimeSig* ts)
       {
-      if (ts->isLocal() && excerpts().size() > 0) {
-            MScore::setError(CANNOT_CHANGE_LOCAL_TIMESIG_HAS_EXCERPTS);
-            return;
-            }
-
       Measure* m = ts->measure();
       Segment* s = ts->segment();