1 files changed, 88 insertions, 0 deletions
diff --git a/fluid/proj/i18n.h b/fluid/proj/i18n.h
new file mode 100644
index 000000000..30e09efae
--- /dev/null
+++ b/fluid/proj/i18n.h
@@ -0,0 +1,88 @@
+//
+// Fluid Project Internationalization header for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 2025 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     https://www.fltk.org/COPYING.php
+//
+// Please see the following page on how to report bugs and issues:
+//
+//     https://www.fltk.org/bugs.php
+//
+
+#ifndef FLUID_PROJ_I18N_H
+#define FLUID_PROJ_I18N_H
+
+#include <string>
+
+namespace fld {
+
+class Project;
+
+/**
+ Enumeration of available internationalization types.
+ */
+enum class I18n_Type {
+  NONE = 0, ///< No i18n, all strings are litearals
+  GNU,      ///< GNU gettext internationalization
+  POSIX     ///< Posix catgets internationalization
+};
+
+namespace io {
+class Project_Reader;
+class Project_Writer;
+}
+
+namespace proj {
+
+/**
+ Data and settings for a FLUID project file.
+ */
+class I18n
+{
+public:
+  Project &project_;
+
+  /// One of the available internationalization types.
+  fld::I18n_Type type = I18n_Type::NONE;
+  /// Include file for GNU i18n, writes an #include statement into the source
+  /// file. This is usually `<libintl.h>` or `"gettext.h"` for GNU gettext.
+  std::string gnu_include = "<libintl.h>";
+  // Optional name of a macro for conditional i18n compilation.
+  std::string gnu_conditional = "";
+  /// For the gettext/intl.h options, this is the function that translates text
+  /// at runtime. This is usually "gettext" or "_".
+  std::string gnu_function = "gettext";
+  /// For the gettext/intl.h options, this is the function that marks the translation
+  /// of text at initialisation time. This is usually "gettext_noop" or "N_".
+  std::string gnu_static_function = "gettext_noop";
+
+  /// Include file for Posix i18n, write a #include statement into the source
+  /// file. This is usually `<nl_types.h>` for Posix catgets.
+  std::string posix_include = "<nl_types.h>";
+  // Optional name of a macro for conditional i18n compilation.
+  std::string posix_conditional = "";
+  /// Name of the nl_catd database
+  std::string posix_file = "";
+  /// Message set ID for the catalog.
+  std::string posix_set = "1";
+
+public: // Methods
+  I18n(Project &p) : project_(p) {};
+  ~I18n() = default;
+  void reset();
+  void read(io::Project_Reader &f, const char *key);
+  void write(io::Project_Writer &f) const;
+};
+
+} // namespace proj
+
+} // namespace fld
+
+#endif // FLUID_PROJ_I18N_H
+
+