From 8b18d160dbd3a0c6ab9bb73504bc2872a00d2dad Mon Sep 17 00:00:00 2001
From: Sebastian Pahnke <pahnke.sebastian@gmail.com>
Date: Mon, 7 Oct 2019 14:33:21 +0200
Subject: [PATCH] Provide related information to diagnostics

---
 src/languageFeatures.ts | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/languageFeatures.ts b/src/languageFeatures.ts
index 7dc0d1d..1ea0899 100644
--- a/src/languageFeatures.ts
+++ b/src/languageFeatures.ts
@@ -200,10 +200,31 @@ export class DiagnosticsAdapter extends Adapter {
 			endLineNumber,
 			endColumn,
 			message: flattenDiagnosticMessageText(diag.messageText, '\n'),
-			code: diag.code.toString()
+			code: diag.code.toString(),
+			relatedInformation: this._convertRelatedInformation(resource, diag.relatedInformation)
 		};
 	}
 
+	private _convertRelatedInformation(resource: Uri, relatedInformation?: ts.DiagnosticRelatedInformation[]): monaco.editor.IRelatedInformation[] {
+		if (relatedInformation === undefined)
+			return undefined;
+
+		return relatedInformation.map(info => {
+			const relatedResource = info.file === undefined ? resource : monaco.Uri.parse(info.file.fileName);
+			const { lineNumber: startLineNumber, column: startColumn } = this._offsetToPosition(relatedResource, info.start);
+			const { lineNumber: endLineNumber, column: endColumn } = this._offsetToPosition(relatedResource, info.start + info.length);
+
+			return {
+				resource: relatedResource,
+				startLineNumber,
+				startColumn,
+				endLineNumber,
+				endColumn,
+				message: flattenDiagnosticMessageText(info.messageText, '\n')
+			};
+		});
+	}
+
 	private _tsDiagnosticCategoryToMarkerSeverity(category: ts.DiagnosticCategory): monaco.MarkerSeverity {
 		switch (category) {
 			case ts.DiagnosticCategory.Error: return monaco.MarkerSeverity.Error