From 220f07bbd7087f1f2da25dd38801015eb7fe9677 Mon Sep 17 00:00:00 2001
From: Ulugbek Abdullaev <ulugbekna@gmail.com>
Date: Fri, 24 Oct 2025 12:31:27 +0200
Subject: [PATCH] nes: turn off emitFastEditAtCursor for long-distance NES
 (#1581)

* nes: minor refactor

* nes: turn off emitFastEditAtCursor for long-distance NES
---
 .../src/extension/inlineEdits/node/nextEditProvider.ts      | 6 ++++--
 extensions/copilot/src/extension/xtab/node/xtabProvider.ts  | 4 +++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts b/extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts
index 8725ac96a92..a551246df9f 100644
--- a/extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts
+++ b/extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts
@@ -305,13 +305,15 @@ export class NextEditProvider extends Disposable implements INextEditProvider<Ne
 		assert(currentDocument !== undefined, 'should be defined if edit is defined');
 
 		telemetryBuilder.setStatus('notAccepted'); // Acceptance pending.
+
 		const showRangePreference = this._statelessNextEditProvider.showNextEditPreference ?? ShowNextEditPreference.AroundEdit;
+
 		let nextEditResult: NextEditResult;
-		if (!showLabel || selections.length < 1) {
+		const currentSelection = selections.at(0);
+		if (!showLabel || currentSelection === undefined) {
 			nextEditResult = new NextEditResult(logContext.requestId, req, { edit, showRangePreference, documentBeforeEdits: currentDocument, targetDocumentId });
 		} else {
 			const transformer = documentAtInvocationTime.getTransformer();
-			const currentSelection = selections[0];
 			const currentCursorPosition = transformer.getRange(currentSelection);
 
 			const editPosition = transformer.getRange(edit.replaceRange);
diff --git a/extensions/copilot/src/extension/xtab/node/xtabProvider.ts b/extensions/copilot/src/extension/xtab/node/xtabProvider.ts
index 09a55873a7e..a983c07d6d9 100644
--- a/extensions/copilot/src/extension/xtab/node/xtabProvider.ts
+++ b/extensions/copilot/src/extension/xtab/node/xtabProvider.ts
@@ -759,7 +759,9 @@ export class XtabProvider implements IStatelessNextEditProvider {
 		}
 
 		const diffOptions: ResponseProcessor.DiffParams = {
-			emitFastCursorLineChange: this.configService.getExperimentBasedConfig(ConfigKey.Internal.InlineEditsXtabProviderEmitFastCursorLineChange, this.expService),
+			emitFastCursorLineChange: opts.showLabel
+				? false
+				: this.configService.getExperimentBasedConfig(ConfigKey.Internal.InlineEditsXtabProviderEmitFastCursorLineChange, this.expService),
 			nLinesToConverge: this.configService.getExperimentBasedConfig(ConfigKey.Internal.InlineEditsXtabNNonSignificantLinesToConverge, this.expService),
 			nSignificantLinesToConverge: this.configService.getExperimentBasedConfig(ConfigKey.Internal.InlineEditsXtabNSignificantLinesToConverge, this.expService),
 		};