Revert "Simplify path2uri"

This reverts commit 01e7781.

Author: felixfbecker

src/util.ts

@@ -84,13 +84,20 @@ export function convertStringtoSymbolKind(kind: string): SymbolKind {
  * The returned URL uses protocol and host of the passed root URL
  */
 export function path2uri(rootUri: URL, filePath: string): URL {
-	let pathname = filePath.replace(/\\/g, '/');
-	if (/^\/[a-z]:\//i.test(pathname)) {
-		pathname = '/' + pathname;
+	const parts = filePath.split(/[\\\/]/);
+	const isWindowsUri = parts[0].endsWith(':');
+	// Don't encode colon after Windows drive letter
+	if (isWindowsUri) {
+		parts[0] = '/' + parts[0];
+	} else {
+		parts[0] = encodeURIComponent(parts[0]);
+	}
+	// Encode all other parts
+	for (let i = 1; i < parts.length; i++) {
+		parts[i] = encodeURIComponent(parts[i]);
 	}
-	const uri = new URL(rootUri.href);
-	uri.pathname = pathname;
-	return uri;
+	const pathname = parts.join(isWindowsUri ? '\\' : '/');
+	return new URL(pathname, rootUri.href);
 }
 
 /**