AK: Add LexicalPath::is_root()

Author: https://github.com/stasoid
Commit: a423493dd8
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2188
Reviewed-by: https://github.com/ADKaster ✅

AK/LexicalPathWindows.cpp

@@ -45,6 +45,11 @@ bool LexicalPath::is_absolute_path(StringView path)
     return path.length() >= 2 && path[1] == ':';
 }
 
+bool LexicalPath::is_root() const
+{
+    return AK::is_root(m_parts);
+}
+
 Vector<ByteString> LexicalPath::parts() const
 {
     Vector<ByteString> vector;
@@ -81,7 +86,7 @@ ByteString LexicalPath::canonicalized_path(ByteString path)
             continue;
         if (part == ".." && !canonical_parts.is_empty()) {
             // At the root, .. does nothing.
-            if (is_root(canonical_parts))
+            if (AK::is_root(canonical_parts))
                 continue;
             // A .. and a previous non-.. part cancel each other.
             if (canonical_parts.last() != "..") {
@@ -95,7 +100,7 @@ ByteString LexicalPath::canonicalized_path(ByteString path)
     StringBuilder builder;
     builder.join('\\', canonical_parts);
     // "X:" -> "X:\"
-    if (is_root(canonical_parts))
+    if (AK::is_root(canonical_parts))
         builder.append('\\');
     path = builder.to_byte_string();
     return path == "" ? "." : path;