1 files changed, 13 insertions, 0 deletions
diff --git a/core/ustring.cpp b/core/ustring.cpp
index 502e6a5a88..09a02a09be 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -4059,6 +4059,19 @@ String String::percent_decode() const {
 	return String::utf8(pe.ptr());
 }
 
+String String::property_name_encode() const {
+	// Escape and quote strings with extended ASCII or further Unicode characters
+	// as well as '"', '=' or ' ' (32)
+	const CharType *cstr = c_str();
+	for (int i = 0; cstr[i]; i++) {
+		if (cstr[i] == '=' || cstr[i] == '"' || cstr[i] < 33 || cstr[i] > 126) {
+			return "\"" + c_escape_multiline() + "\"";
+		}
+	}
+	// Keep as is
+	return *this;
+}
+
 String String::get_basename() const {
 
 	int pos = find_last(".");