Initial Vexta Core v0.1.0 release

src/util/translation.h

@@ -0,0 +1,62 @@
+// Copyright (c) 2019-2020 The DigiByte Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef DIGIBYTE_UTIL_TRANSLATION_H
+#define DIGIBYTE_UTIL_TRANSLATION_H
+
+#include <tinyformat.h>
+#include <functional>
+
+/**
+ * Bilingual messages:
+ *   - in GUI: user's native language + untranslated (i.e. English)
+ *   - in log and stderr: untranslated only
+ */
+struct bilingual_str {
+    std::string original;
+    std::string translated;
+
+    bilingual_str& operator+=(const bilingual_str& rhs)
+    {
+        original += rhs.original;
+        translated += rhs.translated;
+        return *this;
+    }
+
+    bool empty() const
+    {
+        return original.empty();
+    }
+};
+
+inline bilingual_str operator+(bilingual_str lhs, const bilingual_str& rhs)
+{
+    lhs += rhs;
+    return lhs;
+}
+
+/** Mark a bilingual_str as untranslated */
+inline bilingual_str Untranslated(std::string original) { return {original, original}; }
+
+namespace tinyformat {
+template <typename... Args>
+bilingual_str format(const bilingual_str& fmt, const Args&... args)
+{
+    return bilingual_str{format(fmt.original, args...), format(fmt.translated, args...)};
+}
+} // namespace tinyformat
+
+/** Translate a message to the native language of the user. */
+const extern std::function<std::string(const char*)> G_TRANSLATION_FUN;
+
+/**
+ * Translation function.
+ * If no translation function is set, simply return the input.
+ */
+inline bilingual_str _(const char* psz)
+{
+    return bilingual_str{psz, G_TRANSLATION_FUN ? (G_TRANSLATION_FUN)(psz) : psz};
+}
+
+#endif // DIGIBYTE_UTIL_TRANSLATION_H