4 files changed, 34 insertions, 1 deletions
diff --git a/servers/text/text_server_extension.cpp b/servers/text/text_server_extension.cpp
index a2195d1ddf..d7e7960496 100644
--- a/servers/text/text_server_extension.cpp
+++ b/servers/text/text_server_extension.cpp
@@ -271,6 +271,9 @@ void TextServerExtension::_bind_methods() {
 	GDVIRTUAL_BIND(_format_number, "string", "language");
 	GDVIRTUAL_BIND(_parse_number, "string", "language");
 	GDVIRTUAL_BIND(_percent_sign, "language");
+
+	GDVIRTUAL_BIND(_string_to_upper, "string", "language");
+	GDVIRTUAL_BIND(_string_to_lower, "string", "language");
 }
 
 bool TextServerExtension::has_feature(Feature p_feature) const {
@@ -1365,6 +1368,22 @@ String TextServerExtension::percent_sign(const String &p_language) const {
 	return TextServer::percent_sign(p_language);
 }
 
+String TextServerExtension::string_to_upper(const String &p_string, const String &p_language) const {
+	String ret;
+	if (GDVIRTUAL_CALL(_string_to_upper, p_string, p_language, ret)) {
+		return ret;
+	}
+	return p_string;
+}
+
+String TextServerExtension::string_to_lower(const String &p_string, const String &p_language) const {
+	String ret;
+	if (GDVIRTUAL_CALL(_string_to_lower, p_string, p_language, ret)) {
+		return ret;
+	}
+	return p_string;
+}
+
 TextServerExtension::TextServerExtension() {
 	//NOP
 }
diff --git a/servers/text/text_server_extension.h b/servers/text/text_server_extension.h
index 77f2ced951..6e203f22ee 100644
--- a/servers/text/text_server_extension.h
+++ b/servers/text/text_server_extension.h
@@ -449,6 +449,11 @@ public:
 	GDVIRTUAL2RC(String, _parse_number, const String &, const String &);
 	GDVIRTUAL1RC(String, _percent_sign, const String &);
 
+	virtual String string_to_upper(const String &p_string, const String &p_language = "") const override;
+	virtual String string_to_lower(const String &p_string, const String &p_language = "") const override;
+	GDVIRTUAL2RC(String, _string_to_upper, const String &, const String &);
+	GDVIRTUAL2RC(String, _string_to_lower, const String &, const String &);
+
 	TextServerExtension();
 	~TextServerExtension();
 };
diff --git a/servers/text_server.cpp b/servers/text_server.cpp
index 0cc4358785..17840584ee 100644
--- a/servers/text_server.cpp
+++ b/servers/text_server.cpp
@@ -422,6 +422,9 @@ void TextServer::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("strip_diacritics", "string"), &TextServer::strip_diacritics);
 
+	ClassDB::bind_method(D_METHOD("string_to_upper", "string", "language"), &TextServer::string_to_upper, DEFVAL(""));
+	ClassDB::bind_method(D_METHOD("string_to_lower", "string", "language"), &TextServer::string_to_lower, DEFVAL(""));
+
 	/* Direction */
 	BIND_ENUM_CONSTANT(DIRECTION_AUTO);
 	BIND_ENUM_CONSTANT(DIRECTION_LTR);
@@ -480,6 +483,7 @@ void TextServer::_bind_methods() {
 	BIND_ENUM_CONSTANT(FEATURE_BREAK_ITERATORS);
 	BIND_ENUM_CONSTANT(FEATURE_FONT_SYSTEM);
 	BIND_ENUM_CONSTANT(FEATURE_FONT_VARIABLE);
+	BIND_ENUM_CONSTANT(FEATURE_CONTEXT_SENSITIVE_CASE_CONVERSION);
 	BIND_ENUM_CONSTANT(FEATURE_USE_SUPPORT_DATA);
 
 	/* FT Contour Point Types */
diff --git a/servers/text_server.h b/servers/text_server.h
index 07f0ae5045..599cc3afd0 100644
--- a/servers/text_server.h
+++ b/servers/text_server.h
@@ -109,7 +109,8 @@ public:
 		FEATURE_BREAK_ITERATORS = 1 << 4,
 		FEATURE_FONT_SYSTEM = 1 << 5,
 		FEATURE_FONT_VARIABLE = 1 << 6,
-		FEATURE_USE_SUPPORT_DATA = 1 << 7
+		FEATURE_CONTEXT_SENSITIVE_CASE_CONVERSION = 1 << 7,
+		FEATURE_USE_SUPPORT_DATA = 1 << 8,
 	};
 
 	enum ContourPointTag {
@@ -457,6 +458,10 @@ public:
 
 	virtual String strip_diacritics(const String &p_string) const;
 
+	// Other string operations.
+	virtual String string_to_upper(const String &p_string, const String &p_language = "") const = 0;
+	virtual String string_to_lower(const String &p_string, const String &p_language = "") const = 0;
+
 	TextServer();
 	~TextServer();
 };