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## Copyright (C) 2012-2013 John W. Eaton
##
## 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} {} rmpref (@var{group})
## @deftypefnx {Function File} {} rmpref (@var{group}, @var{pref})
## Remove the named preference @var{pref} from the preference group
## @var{group}.
##
## The named preference group must be a character string.
##
## The preference @var{pref} may be a character string or cell array
## of strings.
##
## If @var{pref} is not specified, remove the preference group
## @var{group}.
##
## It is an error to remove a nonexistent preference or group.
## @seealso{addpref, ispref, setpref, getpref}
## @end deftypefn
## Author: jwe
function retval = rmpref (group, pref)
if (nargin < 1 || nargin > 2)
print_usage ();
elseif (! ischar (group))
error ("rmpref: GROUP must be a string");
elseif (nargin == 2 && ! (ischar (pref) || iscellstr (pref)))
error ("rmpref: PREF must be a string or cell array of strings");
endif
if (nargin == 1)
if (ispref (group))
prefs = loadprefs ();
prefs = rmfield (prefs, group);
saveprefs (prefs);
else
error ("rmpref: group <%s> does not exist", group);
endif
else
valid = ispref (group, pref);
if (all (valid))
prefs = loadprefs ();
prefs.(group) = rmfield (prefs.(group), pref);
saveprefs (prefs);
else
if (! ispref (group))
error ("rmpref: group <%s> does not exist", group);
else
idx = find (! valid, 1);
error ("rmpref: pref <%s> does not exist", (cellstr (pref)){idx} );
endif
endif
endif
endfunction
## Testing these functions will require some care to avoid wiping out
## existing (or creating unwanted) preferences for the user running the
## tests.
## Test input validation
%!error rmpref ()
%!error rmpref (1,2,3)
%!error rmpref ({"__group1__"})
%!error rmpref ("__group1__", 1)
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