## Copyright (C) 2010 Soren Hauberg
##
## This file is part of Octave.
##
## Octave 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.
##
## Octave 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 Octave; see the file COPYING.  If not, see
## <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} winopen (@var{filename})
## Open a file in the users preferred application.
##
## The function asks the operating system to open the given input file in the
## associated application. For example,
##
## @example
## winopen ("my_text_file.txt");
## @end example
##
## @noindent
## opens the file @t{"my_text_file.txt"} in the default text editor.
##
## The function can also be used to open directories in the default file manager.
## For example,
##
## @example
## winopen (pwd ());
## @end example
##
## @noindent
## opens the current directory in the default file manager.
## @end deftypefn

function winopen (filename)
  if (nargin == 1 && ischar (filename))
    ## Make choice depending in operating system
    if (ispc ())
      cmd = "start \"%s\""; # XXX: is this the correct command?
    elseif (ismac ())
      cmd = "open \"%s\""; # XXX: is this the correct command?
    elseif (isunix ())
      cmd = "xdg-open \"%s\"";
    else
      error ("winopen: unsupported operating system");
    endif
    
    ## Run the actual command
    [error_occured, output] = system (sprintf (cmd, filename));
    if (error_occured)
      error ("winopen: could not handle file '%s': %s", filename, output);
    endif
  else
    error ("winopen: one string input argument must be supplied");
  endif
endfunction