#  Copyright (c) 1997-2018
#  Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Berlin, Germany)
#  http://www.polymake.org
#
#  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 2, or (at your option) any
#  later version: http://www.gnu.org/licenses/gpl.txt.
#
#  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.
#-------------------------------------------------------------------------------

package Visual;

# webbrowser supporting JavaScript and SVG documents
custom $webbrowser;

CONFIGURE {
   # 'Open' is for Mac OS X
   find_program($webbrowser, qw( sensible-browser xdg-open chrome firefox open ),
                { prompt => "the web browser",
                  check => sub {
                     # sensible-browser script may appear on a system without any browsers installed
                     $_[0] =~ m{^\S*\bsensible-browser$} && not($ENV{BROWSER} && -x $ENV{BROWSER}) &&
                     !-e "/usr/bin/x-www-browser" && !-e "/etc/alternatives/x-www-browser" &&
                     "sensible-browser can't be chosen because no real web browser is installed";
                  },
                });
}


# Local Variables:
# mode: perl
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
