nonfree: Add htmlcxx.

* nonfree/packages/gog.scm: New file.

nonfree/packages/gog.scm

@@ -0,0 +1,57 @@
+;;; Copyright © 2019 Alex Griffin <a@ajgrf.com>
+;;;
+;;; This program is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+(define-module (nonfree packages gog)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module ((guix licenses) #:prefix license:))
+
+(define-public htmlcxx
+  (package
+    (name "htmlcxx")
+    (version "0.87")
+    (source
+     (origin
+       (method url-fetch)
+       (uri
+        (string-append "mirror://sourceforge/htmlcxx/v"
+                       version "/htmlcxx-" version ".tar.gz"))
+       (sha256
+        (base32 "1j3mzjlczjrk4ahc43s6kzpvzypzjmqz4sillnca5yadrwwgjf2x"))))
+    (build-system gnu-build-system)
+    (home-page "http://htmlcxx.sourceforge.net/")
+    (synopsis "Simple non-validating CSS1 and HTML parser for C++")
+    (description "htmlcxx is a simple non-validating CSS1 and HTML parser for
+C++.  Although there are several other HTML parsers available, htmlcxx has some
+characteristics that make it unique:
+@itemize
+@item STL like navigation of DOM tree, using excelent's tree.hh library from
+Kasper Peeters
+@item It is possible to reproduce exactly, character by character, the original
+document from the parse tree
+@item Bundled CSS parser
+@item Optional parsing of attributes
+@item C++ code that looks like C++ (not so true anymore)
+@item Offsets of tags/elements in the original document are stored in the nodes
+of the DOM tree
+@end itemize
+The parsing politics of htmlcxx were created trying to mimic Mozilla Firefox
+(https://www.mozilla.org) behavior.  So you should expect parse trees similar
+to those create by Firefox.  However, differently from Firefox, htmlcxx does
+not insert non-existent stuff in your html.  Therefore, serializing the DOM
+tree gives exactly the same bytes contained in the original HTML document.")
+    (license (list license:lgpl2.0
+                   license:asl2.0))))