compute before/after changes before applied extra edits, #86984

src/vs/editor/contrib/suggest/suggestController.ts

@@ -259,20 +259,21 @@ export class SuggestController implements IEditorContribution {
 			this.editor.pushUndoStop();
 		}
 
-		if (Array.isArray(suggestion.additionalTextEdits)) {
-			this.editor.executeEdits('suggestController.additionalTextEdits', suggestion.additionalTextEdits.map(edit => EditOperation.replace(Range.lift(edit.range), edit.text)));
-		}
+		// compute overwrite[Before|After] deltas BEFORE applying extra edits
+		const info = this.getOverwriteInfo(item, Boolean(flags & InsertFlags.AlternativeOverwriteConfig));
 
 		// keep item in memory
 		this._memoryService.memorize(model, this.editor.getPosition(), item);
 
+		if (Array.isArray(suggestion.additionalTextEdits)) {
+			this.editor.executeEdits('suggestController.additionalTextEdits', suggestion.additionalTextEdits.map(edit => EditOperation.replace(Range.lift(edit.range), edit.text)));
+		}
+
 		let { insertText } = suggestion;
 		if (!(suggestion.insertTextRules! & CompletionItemInsertTextRule.InsertAsSnippet)) {
 			insertText = SnippetParser.escape(insertText);
 		}
 
-		const info = this.getOverwriteInfo(item, Boolean(flags & InsertFlags.AlternativeOverwriteConfig));
-
 		SnippetController2.get(this.editor).insert(insertText, {
 			overwriteBefore: info.overwriteBefore,
 			overwriteAfter: info.overwriteAfter,