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diff --git a/fluid/widgets/Style_Parser.h b/fluid/widgets/Style_Parser.h
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+//
+// Syntax highlighting for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2025 by Bill Spitzak and others.
+// Copyright 2020 Greg Ercolano.
+//
+// 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_WIDGETS_STYLE_PARSER_H
+#define FLUID_WIDGETS_STYLE_PARSER_H
+
+namespace fld {
+namespace widget {
+
+// Class to manage style parsing, friend of Code_Editor
+class Style_Parser {
+public:
+  const char *tbuff { nullptr };  // text buffer
+  char       *sbuff { nullptr };  // style buffer
+  int         len { 0 };          // running length
+  char        style { 0 };        // current style
+  char        lwhite { 1 };       // leading white space (1=white, 0=past white)
+  int         col { 0 };          // line's column counter
+  char        keyword[40] { };    // keyword parsing buffer
+  char        last { 0 };         // flag for keyword parsing
+
+  Style_Parser() = default;
+
+  // Methods to aid in parsing
+  int  parse_over_char(int handle_crlf=1);
+  int  parse_over_white();
+  int  parse_over_alpha();
+  int  parse_to_eol(char s);
+  int  parse_block_comment();     // "/* text.. */"
+  void buffer_keyword();
+  int  parse_over_key(const char *key, char s);
+  int  parse_over_angles(char s);
+  int  parse_keyword();           // "switch"
+  int  parse_quoted_string(char quote_char, char in_style);
+  // "hello", 'x'
+  int  parse_directive();         // "#define"
+  int  parse_line_comment();      // "// text.."
+  int  parse_escape();            // "\'"
+  int  parse_all_else();          // all other code
+};
+
+} // namespace widget
+} // namespace fld
+
+#endif // FLUID_WIDGETS_STYLE_PARSER_H