From 0cf4fb7cda9c8586b9427d390e285eab7b4e010e Mon Sep 17 00:00:00 2001
From: Katarzyna Marek <kasia@marek.net>
Date: Wed, 20 Mar 2024 15:09:11 +0100
Subject: [PATCH] fix: take last change in `didChange`

---
 .../meta/internal/metals/MetalsLspService.scala      | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala b/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala
index fc50ae6b81c..b6ce1a5bfb5 100644
--- a/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala
+++ b/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala
@@ -1137,8 +1137,15 @@ class MetalsLspService(
 
   override def didChange(
       params: DidChangeTextDocumentParams
-  ): CompletableFuture[Unit] =
-    params.getContentChanges.asScala.headOption match {
+  ): CompletableFuture[Unit] = {
+    val changesSize = params.getContentChanges.size()
+    if (changesSize != 1) {
+      scribe.debug(
+        s"did change notification contained $changesSize content changes, expected 1"
+      )
+    }
+
+    params.getContentChanges.asScala.lastOption match {
       case None => CompletableFuture.completedFuture(())
       case Some(change) =>
         val path = params.getTextDocument.getUri.toAbsolutePath
@@ -1152,6 +1159,7 @@ class MetalsLspService(
           .ignoreValue
           .asJava
     }
+  }
 
   override def didClose(params: DidCloseTextDocumentParams): Unit = {
     val path = params.getTextDocument.getUri.toAbsolutePath