Remove chat escape sequences from chat messages, for future colored chat.

src/util/string.cpp

@@ -729,6 +729,33 @@ static bool parseNamedColorString(const std::string &value, video::SColor &color
 	return true;
 }
 
+std::wstring removeChatEscapes(const std::wstring &s) {
+	std::wstring output;
+	size_t i = 0;
+	while (i < s.length()) {
+		if (s[i] == L'\v') {
+			++i;
+			if (i == s.length()) continue;
+			if (s[i] == L'(') {
+				++i;
+				while (i < s.length() && s[i] != L')') {
+					if (s[i] == L'\\') {
+						++i;
+					}
+					++i;
+				}
+				++i;
+			} else {
+				++i;
+			}
+			continue;
+		}
+		output += s[i];
+		++i;
+	}
+	return output;
+}
+
 void str_replace(std::string &str, char from, char to)
 {
 	std::replace(str.begin(), str.end(), from, to);