From e02a097280094801659ad123e6b9ac097cc70102 Mon Sep 17 00:00:00 2001
From: bruvzg <7645683+bruvzg@users.noreply.github.com>
Date: Mon, 17 Jan 2022 10:54:45 +0200
Subject: [TextServer] Implement locale and context sensitive case conversion
 functions.

---
 modules/text_server_fb/text_server_fb.cpp | 29 +++++++++++++++++++++++++++++
 modules/text_server_fb/text_server_fb.h   |  3 +++
 2 files changed, 32 insertions(+)

(limited to 'modules/text_server_fb')

diff --git a/modules/text_server_fb/text_server_fb.cpp b/modules/text_server_fb/text_server_fb.cpp
index c7a7c4aa70..ffbd2da22d 100644
--- a/modules/text_server_fb/text_server_fb.cpp
+++ b/modules/text_server_fb/text_server_fb.cpp
@@ -32,6 +32,7 @@
 
 #include "core/error/error_macros.h"
 #include "core/string/print_string.h"
+#include "core/string/ucaps.h"
 
 #include "modules/modules_enabled.gen.h" // For freetype, msdfgen.
 
@@ -3356,6 +3357,34 @@ float TextServerFallback::shaped_text_get_underline_thickness(RID p_shaped) cons
 	return sd->uthk;
 }
 
+String TextServerFallback::string_to_upper(const String &p_string, const String &p_language) const {
+	String upper = p_string;
+
+	for (int i = 0; i < upper.size(); i++) {
+		const char32_t s = upper[i];
+		const char32_t t = _find_upper(s);
+		if (s != t) { // avoid copy on write
+			upper[i] = t;
+		}
+	}
+
+	return upper;
+}
+
+String TextServerFallback::string_to_lower(const String &p_string, const String &p_language) const {
+	String lower = p_string;
+
+	for (int i = 0; i < lower.size(); i++) {
+		const char32_t s = lower[i];
+		const char32_t t = _find_lower(s);
+		if (s != t) { // avoid copy on write
+			lower[i] = t;
+		}
+	}
+
+	return lower;
+}
+
 TextServerFallback::TextServerFallback() {
 	_insert_feature_sets();
 };
diff --git a/modules/text_server_fb/text_server_fb.h b/modules/text_server_fb/text_server_fb.h
index e8619e0825..b356b90d2c 100644
--- a/modules/text_server_fb/text_server_fb.h
+++ b/modules/text_server_fb/text_server_fb.h
@@ -430,6 +430,9 @@ public:
 	virtual float shaped_text_get_underline_position(RID p_shaped) const override;
 	virtual float shaped_text_get_underline_thickness(RID p_shaped) const override;
 
+	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;
+
 	TextServerFallback();
 	~TextServerFallback();
 };
-- 
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