Make paste resource respect paste location (#207635)

Fixes #207186

extensions/markdown-language-features/src/util/uriList.ts

@@ -3,12 +3,33 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+import { coalesce } from './arrays';
+import * as vscode from 'vscode';
+
 function splitUriList(str: string): string[] {
 	return str.split('\r\n');
 }
 
-export function parseUriList(str: string): string[] {
+function parseUriList(str: string): string[] {
 	return splitUriList(str)
 		.filter(value => !value.startsWith('#')) // Remove comments
 		.map(value => value.trim());
 }
+
+export class UriList {
+
+	static from(str: string): UriList {
+		return new UriList(coalesce(parseUriList(str).map(line => {
+			try {
+				return { uri: vscode.Uri.parse(line), str: line };
+			} catch {
+				// Uri parse failure
+				return undefined;
+			}
+		})));
+	}
+
+	private constructor(
+		public readonly entries: ReadonlyArray<{ readonly uri: vscode.Uri; readonly str: string }>
+	) { }
+}