Fix script editor wrongly replaces and quotes non-ASCII letters

2 files changed, 25 insertions, 1 deletions

diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp
index 2683addd4b..391a203d5b 100644
--- a/core/string/ustring.cpp
+++ b/core/string/ustring.cpp
@@ -4626,7 +4626,7 @@ bool String::is_absolute_path() const {
 
 String String::validate_ascii_identifier() const {
 	if (is_empty()) {
-		return "_"; // Empty string is not a valid identifier;
+		return "_"; // Empty string is not a valid identifier.
 	}
 
 	String result;
@@ -4647,6 +4647,29 @@ String String::validate_ascii_identifier() const {
 	return result;
 }
 
+String String::validate_unicode_identifier() const {
+	if (is_empty()) {
+		return "_"; // Empty string is not a valid identifier.
+	}
+
+	String result;
+	if (is_unicode_identifier_start(operator[](0))) {
+		result = *this;
+	} else {
+		result = "_" + *this;
+	}
+
+	int len = result.length();
+	char32_t *buffer = result.ptrw();
+	for (int i = 0; i < len; i++) {
+		if (!is_unicode_identifier_continue(buffer[i])) {
+			buffer[i] = '_';
+		}
+	}
+
+	return result;
+}
+
 bool String::is_valid_ascii_identifier() const {
 	int len = length();
 
diff --git a/core/string/ustring.h b/core/string/ustring.h
index 11f15031f9..5d4b209c25 100644
--- a/core/string/ustring.h
+++ b/core/string/ustring.h
@@ -460,6 +460,7 @@ public:
 	static String get_invalid_node_name_characters(bool p_allow_internal = false);
 	String validate_node_name() const;
 	String validate_ascii_identifier() const;
+	String validate_unicode_identifier() const;
 	String validate_filename() const;
 
 	bool is_valid_ascii_identifier() const;